The Matrícula de Tributos (English: Tribute roll) is a 16th-century central Mexican manuscript on amatl paper, listing the tribute paid by the various tributaries of the Aztec Empire. Each page represents one province. The provinces totaled sixteen. Layout wise, the rolls are read from the bottom left up. The major city for the province is listed first. Further up the page there are tributes for cities that are under the rule of that major city. Each glyph shows an item that that town or city had use for tribute. It also keeps track of how many of what item were contributed in Nahuatl. Hernán Cortés had people make copies of the tribute roll in order to learn more about the Aztec economy. There are hundreds of tribute glyphs listed in it. It's considered an important document in learning about Nahuatl and Aztec culture, mathematics, governance, economy and geography. It is held in the collection of the Instituto Nacional de Antropología e Historia. The Matrícula was the source for the tribute section of the Codex Mendoza.

Matru Bhoomi

Mats (disambiguation)

The Mystique and Mystique 220 were 2D, 3D, and video accelerator cards for personal computers designed by Matrox, using the VGA connector. The original Mystique was introduced in 1996, with the slightly upgraded Mystique 220 having been released in 1997.

The Matrícula Consular de Alta Seguridad (MCAS) (Consular Identification Card) is an identification card issued by the Government of Mexico through its consulate offices to Mexican nationals residing outside of Mexico. Also known as the Mexican CID card, it has been issued since 1871. The issue of the card has no bearing on immigration status in the foreign country they are residing in. The purpose of the card is to demonstrate that the bearer is a Mexican national living outside of Mexico. It includes a Government of Mexico issued ID number and bears a photograph and address outside of Mexico of the Mexican National to whom it is issued.

Mats R. Berdal (born 5 October 1965) is Professor of Security and Development at the Department of War Studies, King's College London.

Matrox Parhelia-512 is a GPU with full support for DirectX 8.1 and incorporating several DirectX 9.0 features. Released in 2002, it was best known for its ability to drive three monitors ("Surround Gaming") and its Coral Reef tech demo. As had happened with previous Matrox products, the Parhelia was released just before competing companies released cards that completely outperformed it. In this case it was the ATI Radeon 9700, released only a few months later. The Parhelia remained a niche product, and was Matrox's last major effort to sell into the consumer market.

Matrushka doll

Mats (gymnastics)

Matrix singularity

Mats Bergmans

Matrixx

Mats Ahlgren (born 19 June 1967) is a Swedish fencer. He competed in the team épée events at the 1992 Summer Olympics.

Mats Göran Hallin (born March 9, 1958 in Eskilstuna, Sweden) is a retired professional ice hockey player who played 152 games in the National Hockey League. He played with the New York Islanders and Minnesota North Stars. He would win one Stanley Cup with the Islanders in 1983. He is currently the Director of European Scouting for the Chicago Blackhawks

The Matron Stakes is an American Thoroughbred horse race held annually during the Fall at Belmont Park in Elmont, Long Island, New York. It is open to two-year-old fillies and is the filly counterpart to the Belmont Futurity Stakes. The Matron Stakes was run over a straight course before 1959 (except for 1941). Since inception, it has been contested at various distances:
* Six furlongs : 1892-1972, 2011 to present
* Seven furlongs : 1972-1993, 2005-2009
* One mile : 1994-2004 The Matron will be run as a turf race for the first time in 2018.

Matrona kricheldorffi

Mats Haldin (born May 17, 1975) is a Finnish orienteering competitor and two times European champion with the Finnish relay team. He received a silver medal with the Finnish relay team at the 2003 World Orienteering Championships in Rapperswil/Jona, and again in 2006 in Aarhus.He received a bronze medal in relay at the 2007 World Championships in Kiev. At the 2009 World Orienteering Championships in Miskolc he won a bronze medal in the relay, together with Topi Anjala and Tero Föhr. His wife is orienteer from Czech Republic Vendula Klechová. Daughter Hanna was born on 25 May 2011.

The Matrícula de Tributos (English: Tribute roll) is a 16th-century central Mexican manuscript on amatl paper, listing the tribute paid by the various tributaries of the Aztec Empire. Each page represents one province. The provinces totaled sixteen. Layout wise, the rolls are read from the bottom left up. The major city for the province is listed first. Further up the page there are tributes for cities that are under the rule of that major city. Each glyph shows an item that that town or city had use for tribute. It also keeps track of how many of what item were contributed in Nahuatl. Hernán Cortés had people make copies of the tribute roll in order to learn more about the Aztec economy. There are hundreds of tribute glyphs listed in it. It's considered an important document in learning a

Mats Anders Björke (* 10 June 1982 in Falun) is a Swedish musician (keyboard) and producer. From 2004 to 2014, he was a member of the Swedish band Mando Diao.

Mats Foyer

The matrix vote is a voting procedure which can be used when one group of people wishes to elect a smaller number of persons, each of whom is to have a different assignment. Examples of its use are 1.
* when an association elects its executive committee; and 2.
* when a parliament elects its all-party power-sharing coalition government. Consider the situation in which a parliament elects a government of ten ministers.

Matroid theory

Matron Stakes (Churchill Downs)

Mats/Morgan

Matroneum

Mats Haakenstad (born 14 November 1993) is a Norwegian footballer who plays as defender for Lillestrøm.

Matrusri Nagar, Miyapur, Hyderabad

Matryoshka (Millennium)

Mats Michael Hinze

Mats Frøshaug

In combinatorics, a branch of mathematics, a matroid is a structure that abstracts and generalizes the notion of linear independence in vector spaces. There are many equivalent ways to define a matroid, the most significant being in terms of independent sets, bases, circuits, closed sets or flats, closure operators, and rank functions.

Per Mats Stefan Erixon (born 19 March 1958) is a Swedish long-distance runner. He competed in the men's 5000 metres at the 1984 Summer Olympics.

Mats Frøshaug (born 31 July 1988, in Manglerud, Norway) is a Norwegian professional ice hockey player who is currently with Västervik of HockeyAllsvenskan.

In combinatorial optimization, the matroid intersection problem is to find a largest common independent set in two matroids over the same ground set. If the elements of the matroid are assigned real weights, the weighted matroid intersection problem is to find a common independent set with the maximum possible weight. These problems generalize many problems in combinatorial optimization including finding maximum matchings and maximum weight matchings in bipartite graphs and finding arborescences in directed graphs.

Mats Bergmans is a dansband from Nyköping, Sweden, established in 1973 as "Sjösa kustband", before a naming dispute made them change name to "Sjösagrabbarna". The band became a full-time band in 1981, and changed name to Mats Bergmans in 1987.

Matrubhoomi: A Nation Without Women

Matruchotii

Matriz (Horta)

Matrox Simple Interface (in short MSI) is the name of a proprietary DOS and Windows 95 application programming interface for Matrox Mystique graphics cards made by Matrox. MSI API supported a maximum of 640x480x16 resolution with z-buffer and no bilinear filtering. It used color look up tables to save memory. When Matrox released the Matrox m3D (using the PowerVR PCX2 chipset), MSI was completely abandoned.

Saint Matrona of Chios (also called "Saint Matrona Chiopolitis") was born during the 15th century in the village of Volissos on the island of Chios, Greece. This is the same village in which St. Markella was martyred in 1462. The Church celebrates her memory on October 20, and the finding of her head on July 15.

Matriz Church of Póvoa de Varzim

Matro

Matroid

Mats Olof Aronsson (born 16 Augusti 1951) is a former Swedish football player. He played for the Swedish clubs Landskrona BoIS and Djurgårdens IF. He became the top scorer in Allsvenskan 1977 together with Reine Almqvist. Between 2007 and spring of 2014 he worked as the Director of Sports in the Swedish football club Landskrona BoIS. He is the current chairman of IK Frej Täby.

Mats Fransson (born 1 June 1962) is a Swedish former handball player who competed in the 1988 Summer Olympics.

Mats Andersson, born 1954, is a Swedish financier and asset manager. After previous work at Warburg, Deutsche Bank, and Skandia Liv, he assumed the role as CEO for one of Sweden's major pension funds Fjärde AP-fonden (AP4) where he led the work to redirect investments in the energy sector towards fossil free companies within the government directive Fossilfritt Sverige (Fossil Free Sweden) that engages more than 200 companies, municipalities, counties, regions, and other organizations. He also actively collaborated with the United Nations to raise awareness of the risks climate change brings, from a finance and investment perspective.

Matrotrophy

Matrixxman

Mats Andersson, born 1954, is a Swedish financier and asset manager. After previous work at Warburg, Deutsche Bank, and Skandia Liv, he assumed the role as CEO for one of Sweden's major pension funds Fjärde AP-fonden (AP4) where he led the work to redirect investments in the energy sector towards fossil free companies within the government directive Fossilfritt Sverige (Fossil Free Sweden) that engages more than 200 companies, municipalities, counties, regions, and other organizations. He also actively collaborated with the United Nations to raise awareness of the risks climate change brings, from a finance and investment perspective. Andersson was a driving force behind the project (PDC) that was founded and co-financed by AP4 along with United Nations Environment Programme Finance Initiative (UNEP FI), Amundi, and the Carbon Disclosure Project (CDP). The initiative was implemented by Andersson by having AP4 significantly reduce or let go entirely of held shares in American companies with a large carbon footprint, combined with a strategy for investments on emerging markets in companies with a small footprint. Andersson was awarded the Chief Investment Officer's Lifetime Achievement Award in 2016. In 2015 he was ranked fifth on the Financial News "100 Most Influential List" in the pension fund category, and the same year fourth on the Sovereign Wealth Fund Institutes "Public Investor 100" list. He left AP4 in March 2016 to, among other things, act as Vice Chairman of the Global Challenges Foundation with special focus on global governance and global catastrophic risks. In December 2016 he was appointed Royal Commissioner by the Swedish government to "map how the market for green bonds can be promoted.

Mats Deijl

Mats Holt

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Matrox TripleHead2Go

Matronym

In the mathematical theory of matroids, a minor of a matroid M is another matroid N that is obtained from M by a sequence of restriction and contraction operations. Matroid minors are closely related to graph minors, and the restriction and contraction operations by which they are formed correspond to edge deletion and edge contraction operations in graphs. The theory of matroid minors leads to structural decompositions of matroids, and characterizations of matroid families by forbidden minors, analogous to the corresponding theory in graphs.

Matrupuri is a holy place located at Risida in the Kalahandi district of Odisha, India. It means 'the Abode of The Mother'. The place has been named after The Mother of Sri Aurobindo Ashram, in Pondicherry. This holy place was developed in June, 1968 amidst beautiful natural surroundings of hills (Bhaludunguri and Adendunguri). Matrupuri is the brain child of Sri Madhusudan Mishra, now in Sri Aurobindo Ashram. The organisation is run by the devotees of The Mother, namely, Sri Maheswar Rana, Sri Rajib Lochan Rana, Sri Indramani Rana and others with the blessings of The Mother. Coordinates of Matrupuri are [20°23'20"N 83°28'57"E][wikimapia.org/12073470/Matrupuri-RISIDA-kalahandi] Matrupuri is managed and run by Matrupuri Karyalaya , a registered society which runs a school, Sri Aurobindo Integral Education Centre. There is a proposal to set up an Institute of Higher Education and a National Library. Regular programmes are organised in the premises of Matrupuri Karyalaya. Hamlet named Matrupuri has been developed nearby the Matrupuri Karyalaya. Matrupuri is the seat of J K Mahavidyalaya College, Jagannath Degree College of Risida.

Matriz Church of Póvoa de Varzim (Portuguese: Igreja Matriz da Póvoa de Varzim, literally Mother Church of Póvoa de Varzim), also Nossa Senhora da Conceição Parish Church is the Mother Roman Catholic church in Póvoa de Varzim, Portugal. The temple is located in Praça Velha square, in Bairro da Matriz quarter. The church is dedicated to the Our Lady of the Immaculate Conception, Nossa Senhora da Conceição in Portuguese, the main patron saint of Póvoa de Varzim. Of Baroque architecture and of high artistic value, the temple was built in the 18th century siding the old Póvoa de Varzim town hall, a proof of the alliance of Póvoa de Varzim Town Hall with the Archdiocese of Braga, important for the territorial disputes that the town had with the House of Braganza.

Matriz

In mathematics, a matroid polytope, also called a matroid basis polytope (or basis matroid polytope) to distinguish it from other polytopes derived from a matroid, is a polytope constructed via the bases of a matroid. Given a matroid , the matroid polytope is the convex hull of the indicator vectors of the bases of .

Mats Fransson

Matroid intersection

A matross was a soldier of artillery, who ranked next below a gunner. The duty of a matross was to assist the gunners in loading, firing and sponging the guns. They were provided with firelocks, and marched with the store-wagons, acting as guards. In the United States Army, a matross ranked as a private of artillery. The word is probably derived from French matelot, or from German Matrose, both of which refer to a sailor or seaman.

Matron is the job title of a very senior or the chief nurse in several countries, including the United Kingdom, its former colonies, such as India, and also the Republic of Ireland. The chief nurse, in other words the person in charge of nursing in a hospital and the head of the nursing staff, is also known as the Senior Nursing Officer, matron, nursing officer, or clinical nurse manager in UK English; the head nurse or director of nursing in US English, and the nursing superintendent or matron in Indian English, among other countries in the Commonwealth of Nations. In the United Kingdom, matrons today "have powers over budgets, catering and cleaning as well as being in charge of nurses" and "have the powers to withhold payments from catering and cleaning services if they don't think they are giving the best service to the NHS." Historically, matrons supervised the hospital as a whole but today, they are in-charge of supervising two or three wards. The chief nurse is a registered nurse who supervises the care of all the patients at a health care facility. The chief nurse is the senior nursing management position in an organization and often holds executive titles like chief nursing officer (CNO), chief nurse executive, or vice-president of nursing. They typically report to the CEO or COO.

Matrox Millennium G250

Matrox G400

Matruh Governorate

In statistics, the matrix variate Dirichlet distribution is a generalization of the matrix variate beta distribution. Suppose are positive definite matrices with , where is the identity matrix. Then we say that the have a matrix variate Dirichlet distribution, , if their joint probability density function is where and is the . If we write then the PDF takes the simpler form on the understanding that .

The Matron Stakes is a Group 1 flat horse race in Ireland open to thoroughbred fillies and mares aged three years or older. It is run at Leopardstown over a distance of 1 mile (1,609 metres), and it is scheduled to take place each year in September.

Matrix unit

Matriz is a freguesia ("civil parish") in the municipality of Horta, in the Portuguese Azores, which is part of the urbanized core of the city of Horta. The population in 2011 was 2,562, in an area of 1.81 km². It is the smallest and most populous parish on the island.

Matruh (disambiguation)

Matrix transformations

Mats Ahlberg

Matrix theory (string theory)

Matrona (Filipino for "matron") is a story arc of the Philippine comic strip series Pugad Baboy, created by Pol Medina Jr. and originally published in the Philippine Daily Inquirer. This particular story arc lasts 23 strips long. In 1998, the story arc was reprinted in Pugad Baboy X, the tenth book compilation of the comic strip series.

Mats Bjoerke

Matrix string theory

Matrixx Magixx was a professional basketball team based in Nijmegen and later Wijchen. The club played in the Dutch Basketball League (DBL), the Dutch top-tier league. Home games of the Magixx were played in Sporthal De Arcus since 2012, therefore De Horstacker was used. The long time main sponsor of the team was The Matrixx. In 2014, Magixx departed from the DBL after the club could not find funding. Founded as a new team from Nijmegen after the departure of Nijmegen, the club played in the DBL for nine straight seasons. Its biggest success was the NBB Cup championship in 2006–07, when Magixx beat Donar in the final. In the 2011–12 season, Magixx finished as runners-up in the DBL.

Matrupuri is a holy place located at Risida in the Kalahandi district of Odisha, India. It means 'the Abode of The Mother'. The place has been named after The Mother of Sri Aurobindo Ashram, in Pondicherry. This holy place was developed in June, 1968 amidst beautiful natural surroundings of hills (Bhaludunguri and Adendunguri). Matrupuri is the brain child of Sri Madhusudan Mishra, now in Sri Aurobindo Ashram. The organisation is run by the devotees of The Mother, namely, Sri Maheswar Rana, Sri Rajib Lochan Rana, Sri Indramani Rana and others with the blessings of The Mother. Coordinates of Matrupuri are [20°23'20"N 83°28'57"E][wikimapia.org/12073470/Matrupuri-RISIDA-kalahandi]

Matroska Video

Mats Hellstroem

Matrix transfer molding

Mats/Morgan Band

The Olympic bomber (OS-bombaren)

Matrona of Barcelona or Matrona of Thessalonica (Catalan: Madrona, IPA: [məˈðɾonə]) is a saint of the Roman Catholic Church and the Eastern Orthodox Church. She was recognized as a saint pre-congregation.

Mats Michael Hinze (born 22 September 1970), also known as The Olympic bomber (Swedish: OS-bombaren), is a Swedish right-wing anarchist who was caught carrying a backpack containing explosives by Millesgården in 1997.

Mats Ericson (born 20 September 1964) is a Swedish former alpine skier who competed in the 1992 Winter Olympics and 1994 Winter Olympics.

Matrix variate Dirichlet distribution

Federal State Institution IZ-77/1 of the Office of the Federal Penitentiary Service of Russia in the City of Moscow is a prison located in the Sokolniki District of Moscow, Russia. The facility is commonly known as Matrosskaya Tishina (Russian: Матросская тишина, lit. "Seaman's Silence"), after the name of the street on which it is located in north-eastern Moscow. Matrosskaya Tishina is operated by the Federal Penitentiary Service, famously holding Mikhail Khodorkovsky and some plotters of the 1991 Soviet coup d'état attempt.

Matrixx Magixx was a professional basketball team based in Nijmegen and later Wijchen. The club played in the Dutch Basketball League (DBL), the Dutch top-tier league. Home games of the Magixx were played in Sporthal De Arcus since 2012, therefore De Horstacker was used. The long time main sponsor of the team was The Matrixx. In 2014, Magixx departed from the DBL after the club could not find funding.

Mats Hansson

Mats Bolmstedt (July 8, 1920 – December 9, 1965) was a Swedish speed skater who competed in the 1948 Winter Olympics and in the 1952 Winter Olympics. In 1948 he finished tenth in the 500 metres competition and 17th in the 1500 metres event.

Mats Arvidsson

In matroid theory, a mathematical discipline, the girth of a matroid is the size of its smallest circuit or dependent set. The cogirth of a matroid is the girth of its dual matroid. Matroid girth generalizes the notion of the shortest cycle in a graph, the edge connectivity of a graph, Hall sets in bipartite graphs, even sets in families of sets, and general position of point sets. It is hard to compute, but fixed-parameter tractable for linear matroids when parameterized both by the matroid rank and the field size of a linear representation.

Matrixxman, otherwise known as Charles M. Duff, is an American electronic musician and DJ.

Saint Matronian (U.S.) (Italian: San Matroniano) was a hermit of Milan. It is recorded that Saint Ambrose enshrined Matronian's relics in the church of San Nazaro Maggiore in Milan.

Matruh

Matruska

The Matrons' Council for Great Britain and Ireland was established in 1894 during the campaign for the registration of nurses. Margaret Huxley was a founder member. It was represented on the Central Committee for the State Registration of Nurses in 1908.

Matrotrophic

matrixx is a production company that specializes in feature film, television, and online branded entertainment located in Santa Monica, California. The company is privately held and venture backed by Hollywood producer and entrepreneur Van Vandegrift.

Matrox G200

Matrona nigripectus

Matroid lattice

Matroid representation

Matroid polytope

Mats Bertil Hansson (born June 11, 1965) is a former Swedish sailor who competed in the 1988 Summer Olympics, where he finished 4th in the Star class together with Mats Johansson.

Mats/Morgan Band (formerly Hot Rats and Zappsteetoot) is a band that features Morgan Ågren and Mats Öberg. Morgan is a drummer and composer and Mats is a keyboard player and composer. The band is a showcase for their virtuosic skills on their respective instruments as well as their compositional skills. Their music is difficult to categorize, containing elements of jazz, electronic music, waltz, dance music, avant garde/free jazz, techno, rock, progressive and modern classical music. Morgan Ågren has been a drummer since age four. Born in Umeå, Sweden, Ågren was spotted as an outstanding talent at a young age as he began performing publicly at age seven, and eventually joined forces with keyboardist Mats Öberg in 1981. They later formed Zappsteetoot together in 1984, a band internationally known for performing Frank Zappa's music. In 1988, Ågren and Öberg were invited by Zappa to do a guest performance at his Stockholm performance. Frank Zappa then invited them to the United States to partake in several projects, including the 1991 Zappa's Universe shows in New York, which Zappa was already too ill to attend, as well as a sold out New York performance of Zappa's classical program at Lincoln Centers Great Performers Series at Avery Fisher Hall. Morgan Ågren also collaborated with the guitarist of Swedish experimental metal band Meshuggah, Fredrik Thordendal, on the album Sol Niger Within, which was released in 1997.

Matrona corephaea

Matrix von Mises–Fisher distribution

The Matronae Aufaniae (or Matres Aufaniae or Deae Aufaniae) were one name for Celtic mother goddesses (Matronae) worshipped throughout Celtic Europe. They are known only from inscriptions and reliefs, which have been found mainly in the German Rhineland.

Matryoshka (Song)

Matrusree Anglo Vedic School is an English Medium school based in the coastal city of Berhampur (Odisha) in India. It is located in the heart of the city near Hill Patna, Nehru Park close to the City Railway Station. It is one of the most popular and best known schools in the entire southern region of Odisha. The school offers courses from preparatory, nursery and classes one to ten and follows the ICSE syllabus offered by the Council for the Indian School Certificate Examinations. Founded in the late 1970s, it has around 1200 students and around 60 faculty members.

Matron Stakes (Ireland)

Matrona is a genus of damselflies in the family Calopterygidae. Species include:
* Matrona basilaris
* Matrona corephaea
* Matrona cyanoptera
* Matrona kricheldorffi
* Matrona nigripectus
* Matrona oberthueri
* Matrona oreades
* Matrona taoi

Matrix switch

Mats Ahlgren

Matroesjkas

Mats Holt (born 3 April 1998) is a Norwegian footballer who plays for Tønsberg. He hails from Nøtterøy and joined regional greats Sandefjord as a youth player, also featuring for Norway's youth national team. Following a loan spell at Ørn-Horten in 2016 he finally made his first-team debut for Sandefjord in 2017. After the season he was offered a new contract, but left in order to study at the Norwegian School of Sport Sciences and play for third-tier Kjelsås. He did not manage to win a cap for Kjelsås, and after half a year went on to fourth-tier Ullern. He moved home to FK Tønsberg.

The Matron Stakes is an American Thoroughbred horse race held annually during the Fall at Belmont Park in Elmont, Long Island, New York. It is open to two-year-old fillies and is the filly counterpart to the Belmont Futurity Stakes. Before 1902, it was run in two divisions, one for fillies and one for colts. After 1915, it was restricted to fillies. The inaugural race took place at Morris Park Racecourse in The Bronx, New York where it remained until 1905 when it was moved to the new Belmont Park. Through special arrangements, in 1910 it was hosted by Pimlico Race Course in Baltimore, Maryland. Aqueduct Racetrack hosted the race in 1960 and again from 1962 to 1968. The Matron Stakes was run over a straight course before 1959 (except for 1941). Since inception, it has been contested at various distances:
* Six furlongs : 1892-1972, 2011 to present
* Seven furlongs : 1972-1993, 2005-2009
* One mile : 1994-2004 There was no race from 1895 to 1898, from 1911 to 1913 as a result of New York state legislation that banned parimutuel betting, from 1915 to 1922, and in 2001 it was cancelled in observance of the September 11, 2001 attacks on the World Trade Center in New York City. The Matron will be run as a turf race for the first time in 2018.

Mats Gunnar Hessel (born 13 March 1961) is an ice hockey player who played for the Swedish national team. He won a bronze medal at the 1984 Winter Olympics. He played mostly for AIK in Stockholm and won two Swedish championships with them in 1982 and 1985.

Matriyeshka doll

The matroid partitioning problem is a problem arising in the mathematical study of matroids and in the design and analysis of algorithms, in which the goal is to partition the elements of a matroid into as few independent sets as possible. An example is the problem of computing the arboricity of an undirected graph, the minimum number of forests needed to cover all of its edges. Matroid partitioning may be solved in polynomial time, given an independence oracle for the matroid. It may be generalized to show that a is itself a matroid, to provide an algorithm for computing ranks and independent sets in matroid sums, and to compute the largest common independent set in the intersection of two given matroids.

Mats Gerdau (born 1964), is a Swedish politician of the Moderate Party. He was a member of the Riksdag from 2006 to 2012 and has been Mayor of Nacka Municipality since then.

Matryoshka Doll

In physics, matrix string theory is a set of equations that describe superstring theory in a non-perturbative framework. Type IIA string theory can be shown to be equivalent to a maximally supersymmetric two-dimensional gauge theory, the gauge group of which is U(N) for a large value of N. This matrix string theory was first proposed by Luboš Motl in 1997 and later independently in a more complete paper by Robbert Dijkgraaf, Erik Verlinde, and Herman Verlinde. Another matrix string theory equivalent to Type IIB string theory was constructed in 1996 by Ishibashi, Kawai, Kitazawa and Tsuchiya. This version is known as the IKKT matrix model.

The Matro (2,171 m) is a mountain of the Swiss Lepontine Alps, overlooking Giornico in the canton of Ticino. It lies at the southern end of the chain separating the main Leventina valley from the Blenio valley. An antenna is located on the summit.

The G200 is a 2D, 3D, and video accelerator chip for personal computers designed by Matrox. It was released in 1998.

In combinatorics, a branch of mathematics, a matroid is a structure that abstracts and generalizes the notion of linear independence in vector spaces. There are many equivalent ways to define a matroid, the most significant being in terms of independent sets, bases, circuits, closed sets or flats, closure operators, and rank functions. Matroid theory borrows extensively from the terminology of linear algebra and graph theory, largely because it is the abstraction of various notions of central importance in these fields. Matroids have found applications in geometry, topology, combinatorial optimization, network theory and coding theory.

In mathematics, a matrix unit is an idealisation of the concept of a matrix, with a focus on the algebraic properties of matrix multiplication. The topic is comparatively obscure within linear algebra, because it entirely ignores the numeric properties of matrices; it is mostly encountered in the context of abstract algebra, especially the theory of semigroups. Despite the name, matrix units are not the same as unit matrices or unitary matrices.
* 0 x = x 0 = 0 for any matrix unit x;
* (r, c) (s, d) = (r, d) if c = s, and 0 if c ≠ s. For example, the product (with I = N+) Xr c Xs d = δc s Xr d.

Matroska Multimedia Container

Mats G. Nilsson, born in 1968, is a Swedish politician of the Moderate Party. He has been a member of the Riksdag since 2006.

Matrona

Matrupuri

Mats Helge, also known as Mats-Helge Olsson (born 10 May 1953) is a Swedish independent filmmaker, best known for movies such as The Ninja Mission (1984), and he is one of the most productive independent Swedish directors ever, with almost 100 titles to his résumé. He began his career with movies in the 1970s with movies the press called "lingonwesterns". He also directed "I Död mans spår", with Carl-Gustaf Lindstedt and a couple of six-shooters, shot in High Chaparral in Småland, Sweden. Then he made candid camera with Per Oscarsson in Lidköping, and The Ninja Mission. Then he went on to make a few movies with the American actor David Carradine, and action-movies like , , , , The Hired Gun, , , , , , Babysitter and the short-lived Robert Aschberg-series .

Matroyska doll

Matrix trilogy

Matrox RT.X100

Matronymy

Mats Gustafsson (footballer)

Matriz (disambiguation)

Mats Bjurman

The G400 is a video card made by Matrox, released in September 1999. The graphics processor contains a 2D GUI, video, and Direct3D 6.0 3D accelerator. Codenamed "Toucan", it was a more powerful and refined version of its predecessor, the G200.

Matron Stakes (Belmont Park)

Matryshka doll

Mats Arvidsson (born 19 April 1958) is a Swedish former footballer who played as a defender. Arvidsson played for Malmö FF, making 127 appearances for the one club he played for.

Alf Mats Bertil Johansson (born 26 August 1956) is a Swedish Olympic sailor who competed in the 1988 Summer Olympics, finishing 4th, and in the 2000 Summer Olympics, finishing 13th. He also skippered for the Victory Challenge Louis Vuitton Cup challenge and has bronze medal from the in Cleveland, Ohio.

Mats Erixon

Matrotrophy is a form of maternal care during embryo development.

Mats Deijl (born 15 July 1997) is a Dutch football player who plays for FC Den Bosch.

Matrixx Initiatives, Inc., et al. v. Siracusano, et al.

Mats Anders Green (born 6 April 1979) is a Swedish politician of the Moderate Party. He has been Member of the Riksdag since the 2014 general election, representing his home constituency Jönköping County. He served as Mayor of Jönköping from 2011 to 2014. In the Riksdag, Green is a member of the Committee on Civil Affairs and a deputy member of the Committee on Defence. In May 2015 the Government appointed Green as the Riksdag's only representative to The Swedish Commission for Shoreland Protection and Management, which mission was completed by December 2015. On 10 October 2017, Green was appointed his party's spokesperson on housing, being further promoted to spokesperson on employment and integration in May 2019.

Matrosenoberstabsgefreiter

Matryoshka (disambiguation)

Matronalis

Matru pitru poojan

Matrjoska

Matrix test

Matroishka

Matryushka

Matrox Graphics eXpansion Modules

Matrixx Initiatives, Inc. v Siracusano

Matrosskaya Tishina

Matrox G450

Matrox Millennium G450

Matronsapron

Matrudevobhava

Matryoshka Radio

Matron literature (also known as hen lit) is a literary genre which focuses on older female characters as protagonists. The genre has increased in popularity as the baby boomers have aged and female readers have sought characters to identify with. Subjects are often romantic in nature, and heroines are usually between the ages of 45 and 65. Matron lit characters were often married at one point, but are no longer with their spouses or living with their children. There are usually feminist themes in matron literature, though some works are more overtly feminist than others.

Matru sewa sangh

Mats Haldin

Mats Facklam (born 22 August 1996) is a German footballer who plays as a forward for Sportfreunde Lotte.

Matrosovo is a former air base on Sakhalin Island, Russia located 14 km north of Leonidovo. It served as a dispersal airfield for military aircraft on Sakhalin Island during the Cold War. Matrosovo was identified on Western Intelligence documents around 1962. The Central Intelligence Agency's collection of declassified documents do not show that any aircraft were ever observed at this airfield, and no documents after 1970 reference the airfield. In 1985 a Tupolev Tu-16 from Khorol crashed at or near this airfield. Matrosovo was not used after the Cold War and has fallen into a state of decay.

Matriz Church of Povoa de Varzim

Matrox millenium g400

Mats/Morgan Band (formerly Hot Rats and Zappsteetoot) is a band that features Morgan Ågren and Mats Öberg. Morgan is a drummer and composer and Mats is a keyboard player and composer. The band is a showcase for their virtuosic skills on their respective instruments as well as their compositional skills. Their music is difficult to categorize, containing elements of jazz, electronic music, waltz, dance music, avant garde/free jazz, techno, rock, progressive and modern classical music.

Matrix transpose

Matrix transfer mold

Matroyshka

Mats Berdal

Matrox Marvel G200

In combinatorics, a matroid embedding is a set system (F, E), where F is a collection of feasible sets, that satisfies the following properties: 1.
* (Accessibility Property) Every non-empty feasible set X contains an element x such that X\{x} is feasible; 2.
* (Extensibility Property) For every feasible subset X of a basis (i.e., maximal feasible set) B, some element in B but not in X belongs to the extension ext(X) of X, where ext(X) is the set of all elements e not in X such that X∪{e} is feasible; 3.
* (Closure-Congruence Property) For every superset A of a feasible set X disjoint from ext(X), A∪{e} is contained in some feasible set for either all or no e in ext(X); 4.
* The collection of all subsets of feasible sets forms a matroid.

Matrixectomy

Matronian

Matrox Graphics

Mats Ek

Matroid embedding

Matrox Parhelia

Matriz (Ribeira Grande)

Matrushka

Matrox Mystique 220

Matroska video

Matrona taoi

Matroids

Matron Stakes (Australia)

Matriz, Horta, Azores Islands

Matrona cyanoptera

Matryoshka brain

Matroid minor

The Matron Stakes is an American Grade III flat horse race for Thoroughbred fillies and mares, aged three years and upward. Raced over a distance of 9 furlongs on the dirt at Churchill Downs, Louisville, Kentucky every spring. It currently offers a purse of $100,000. Originally the race was held at Arlington Park, Arlington Heights, Illinois and was known as the Arlington Matron Handicap. The event was moved to Churchill Downs in 2017 Inaugurated in 1930, Hall of Fame member, Bewitch, ran second in 1949. Real Delight won it in 1953.

Matrix subtraction

Matrosenstabsgefreiter

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Matrons' Council for Great Britain and Ireland

Matrixial

Matroid duality

Matrox Simple Interface

Mats Helge

Mats Green

Matroid girth

Matross

The matrix vote is a voting procedure which can be used when one group of people wishes to elect a smaller number of persons, each of whom is to have a different assignment. Examples of its use are 1.
* when an association elects its executive committee; and 2.
* when a parliament elects its all-party power-sharing coalition government. Consider the situation in which a parliament elects a government of ten ministers.
* The ballot paper is tabular, a matrix, ten by ten: on one axis are listed the ten ministerial posts to be elected, and on the other axis are the ten preferences.
* Each MP then casts one vote (of a maximum) of ten preferences, naming the ten ministers in her order of preference, and saying at the same time in which ministerial post she wishes each of her nominees to serve. A full ballot will contain one name in each column, and one name in each row: that is, she identifies, in her order of preference, ten nominees, one for each of the ten ministerial posts.
* The count is in two stages: a Quota Borda system (QBS) is used to identify the ten most popular candidates; and then a Modified Borda Count determines which of these successful candidates will serve in which ministry. The matrix vote is proportional. It is ideally suited, therefore, to the formation of power-sharing governments, especially in post-conflict scenarios, and not least because it works without any resort to party or sectarian labels.

Matrixx Magixx

Matrox Graphics eXpansion Module (GXM) supports the use of multiple monitors over a single video source by splitting the output of a video source, providing an enlarged workspace or gaming environment. GXM is not a graphics card itself, and in fact requires a fairly powerful graphics card for playing games on multiple monitors.

Matrixin

Matryona Balk

Matrox RTX100

Matriznet

Matrose (Germany)

Mats Hellstrom

Matrícula Consular

Matrix summability method

Matroosfontein

Mats Björkman

Matroix

Matruvani

Matroska doll

Mats Dumell

Matron-in-Chief, Naval Nursing Service

Matrix variate beta distribution

Matrose (rank)

Matrixes

Mats Gren (born 20 December 1963 in Falun) is a former Swedish footballer and head coach.

Mats Andersson (financier)

Matronymics

Matrona (Pugad Baboy)

Matriyeshka

Saint Matronian

Mats Olof Foyer (born 1954) was the ambassador of the Kingdom of Sweden accredited to and resident in the People's Democratic Republic of Korea (North Korea), a position he held 2005-2010.

Matrona of Barcelona

Mats Gren

Matrusree Anglo Vedic School

Matroni et moi

Matrixx Initiatives, Inc. v. Siracusano, 563 U.S. 27 (2011), is a decision by the Supreme Court of the United States regarding whether a plaintiff can state a claim for securities fraud under §10(b) of the Securities Exchange Act of 1934, as amended, 15 U.S.C. §78j(b), and Securities and Exchange Commission Rule 10b-5, 17 CFR §240.10b-5 (2010), based on a pharmaceutical company's failure to disclose reports of adverse events associated with a product if the reports do not find statistically significant evidence that the adverse effects may be caused by the use of the product. In a 9–0 opinion delivered by Justice Sonia Sotomayor, the Court affirmed the Court of Appeals for the Ninth Circuit's ruling that the respondents, plaintiffs in a securities fraud class action against Matrixx Initiatives, Inc., and three Matrixx executives, had stated a claim under §10(b) and Rule 10b-5.

Matron of Honor

Matrubhoomi (film)

Matrixx Magix Nijmegen

Mats Andre Kaland

Mats Bødker

Matrox marvel g400

Matrëška

Matronaeum

Matroid (company)

A matroneum (plural: matronea; earlier also matronaeum, plural matronaea) in architecture is a gallery on the interior of a building, originally intended to accommodate women (whence the derivation from "matron"). In medieval churches, matronea lost their function of accommodation and became purely architectonic elements, placed over the side aisles with the structural purpose of containing the thrust of the central nave, and came to consist solely of bays so placed. In Early Gothic churches, the matronea were one of the four elements which constituted the interior walls (arch, matroneum, triforium and clerestory), but they grew rare in the succeeding period of full-blown Gothic architecture.

Matryushka doll

Matryona Nikonova

Mats Hinze

Matron Malice

Mats Hallin

Matroid partitioning

Matron Cofelia

Matromicina

Matriz (Ponta Delgada)

Mats Bjurman (born March 9, 1994) is a Swedish American soccer player.

Matrose

Matrubhoomi-A Nation Without Women

Matruchot

In the mathematical theory of matroids, a matroid representation is a family of vectors whose linear independence relation is the same as that of a given matroid. Matroid representations are analogous to group representations; both types of representation provide abstract algebraic structures (matroids and groups respectively) with concrete descriptions in terms of linear algebra.

Mats Froshaug

Matronymic surname

Matrona basilaris

Matrona of Chios

Mats Gerdau

Matrona of Moscow

Matru

In combinatorial optimization, the matroid parity problem is a problem of finding the largest independent set of paired elements in a matroid. The problem was formulated by as a common generalization of graph matching and matroid intersection. It is also known as polymatroid matching, or the matchoid problem. Matroid parity can be solved in polynomial time for linear matroids. However, it is NP-hard for certain compactly-represented matroids, and requires more than a polynomial number of steps in the matroid oracle model. Applications of matroid parity algorithms include finding large planar subgraphs and finding graph embeddings of maximum genus. These algorithms can also be used to find connected dominating sets and feedback vertex sets in graphs of maximum degree three.

Matronymic name

In combinatorial optimization, the matroid intersection problem is to find a largest common independent set in two matroids over the same ground set. If the elements of the matroid are assigned real weights, the weighted matroid intersection problem is to find a common independent set with the maximum possible weight. These problems generalize many problems in combinatorial optimization including finding maximum matchings and maximum weight matchings in bipartite graphs and finding arborescences in directed graphs. The matroid intersection theorem, due to Jack Edmonds, says that there is always a simple upper bound certificate, consisting of a partitioning of the ground set amongst the two matroids, whose value (sum of respective ranks) equals the size of a maximum common independent set. Based on this theorem, the matroid intersection problem for two matroids can be solved in polynomial time using matroid partitioning algorithms.

Mats Anders Green (born 6 April 1979) is a Swedish politician of the Moderate Party. He has been Member of the Riksdag since the 2014 general election, representing his home constituency Jönköping County. He served as Mayor of Jönköping from 2011 to 2014.

Matros (disambiguation)

Mats Ek (born 18 April 1945) is a Swedish dance and ballet choreographer, dancer and stage director. He was the manager of the Cullberg Ballet from 1985 to 1993.

Matriz is a parish in the district of Ribeira Grande in the Azores. The population in 2011 was 3,968, in an area of 10.84 km². It is situated on the north coast of the island. Together with the parish Conceição, it forms the town Ribeira Grande.

Mats Haakenstad

Matron Casp

Matrosovo

Matrix t distribution

Matron literature (also known as hen lit) is a literary genre which focuses on older female characters as protagonists. The genre has increased in popularity as the baby boomers have aged and female readers have sought characters to identify with. Subjects are often romantic in nature, and heroines are usually between the ages of 45 and 65. Matron lit characters were often married at one point, but are no longer with their spouses or living with their children. There are usually feminist themes in matron literature, though some works are more overtly feminist than others. Matron literature has only recently become prominent. It can be regarded as a sub-category of boomer lit, although it originated as an offshoot of chick lit, which became quite popular in the late 1990s. The idea of matron literature being chick lit for older women contributed to the alternative term hen lit for the movement. Since matron lit first began, it increased in scope; there are now industry publishing houses devoted solely to matron literature. Authors of matron literature tend to themselves be women of similar age to their heroines, but are not exclusively so. Works by authors such as Larry McMurtry also are part of the genre. Many matron lit authors have developed popular series of books revolving around the same characters, like 's Ladies of Covington. Other book titles play on themes of women in middle age, including menopause with The Hot Flash Club, The Crone Club and The Red Hat Club, which plays on the Red Hat Society for women over 50.

Matroid is a Computer Vision company that gives typical computer users the ability to scan video. Matroid was founded in 2016 in Palo Alto, California.

Matriz Church of Póvoa de Varzim (Portuguese: Igreja Matriz da Póvoa de Varzim, literally Mother Church of Póvoa de Varzim), also Nossa Senhora da Conceição Parish Church is the Mother Roman Catholic church in Póvoa de Varzim, Portugal. The temple is located in Praça Velha square, in Bairro da Matriz quarter. The church is dedicated to the Our Lady of the Immaculate Conception, Nossa Senhora da Conceição in Portuguese, the main patron saint of Póvoa de Varzim.

Matrix vote

Matryoshka dolls

Matroskin

Matrox Millennium G200

Mats (name)

Mats Facklam

Matrjosjka

Mats Bjorke

Matrixx Initiatives, Inc. v. Siracusano, 563 U.S. 27 (2011), is a decision by the Supreme Court of the United States regarding whether a plaintiff can state a claim for securities fraud under §10(b) of the Securities Exchange Act of 1934, as amended, 15 U.S.C. §78j(b), and Securities and Exchange Commission Rule 10b-5, 17 CFR §240.10b-5 (2010), based on a pharmaceutical company's failure to disclose reports of adverse events associated with a product if the reports do not find statistically significant evidence that the adverse effects may be caused by the use of the product. In a 9–0 opinion delivered by Justice Sonia Sotomayor, the Court affirmed the Court of Appeals for the Ninth Circuit's ruling that the respondents, plaintiffs in a securities fraud class action against Matrixx Initiat

Matron Stakes(USA)

Matrix time

Matrix transform

Matrix wipe

Matryoshka-R (ISS Experiment)

A matroneum (plural: matronea; earlier also matronaeum, plural matronaea) in architecture is a gallery on the interior of a building, originally intended to accommodate women (whence the derivation from "matron"). In medieval churches, matronea lost their function of accommodation and became purely architectonic elements, placed over the side aisles with the structural purpose of containing the thrust of the central nave, and came to consist solely of bays so placed.

Matronae Aufaniae

Matrona of Barcelona or Matrona of Thessalonica (Catalan: Madrona, IPA: [məˈðɾonə]) is a saint of the Roman Catholic Church and the Eastern Orthodox Church. She was recognized as a saint pre-congregation. She lived in the third or fourth century. She was a young girl and a slave to the Jewish woman Pautila (or Pantilla), wife of one of the military commanders (some sources say governor) of Thessalonica. According to legend, she believed in Christ from her youth and Pautila constantly tried to convert her to Judaism. There are two stories of her martyrdom in one she was killed in Rome for taking time to ministering to Christians, in the other she was so severely beaten when she refused to enter a synagogue with her mistress that she subsequently died of her wounds. She is venerated in Barcelona and some villages in Catalonia. She is patron saint of the Santa Madrona church in Barcelona, the Santa Madrona hermitage in the mountain of Montjuïc, as well as churches in the villages of Madrona (Pinell de Solsonès) and Móra d'Ebre. The feast day for the Matrona of Barcelona is 15 March, while that of the Matrona of Thessalonica is 27 March (9 April old style).

Matrixing

Matrox Graphics eXpansion Module (GXM) supports the use of multiple monitors over a single video source by splitting the output of a video source, providing an enlarged workspace or gaming environment. GXM is not a graphics card itself, and in fact requires a fairly powerful graphics card for playing games on multiple monitors. While most modern graphics cards have support for dual monitors and can expand a desktop across three screens, 3D games are generally limited to a single monitor. The GXM uses the standard Extended Display Identification Data (EDID) structure to communicate its capabilities to the graphics card just as a monitor does. However, the GXM's resolution includes all pixels in the three monitors. If the TripleHead2Go were hooked up to three monitors with 800×600 resolution, the TripleHead2Go would report itself as a single monitor with 2400×600 resolution. The graphics card then sends out a 2400×600 signal which the TripleHead2Go divides and distributes to the appropriate monitors.

Matron Lit

In the mathematical theory of matroids, a matroid representation is a family of vectors whose linear independence relation is the same as that of a given matroid. Matroid representations are analogous to group representations; both types of representation provide abstract algebraic structures (matroids and groups respectively) with concrete descriptions in terms of linear algebra. A linear matroid is a matroid that has a representation, and an F-linear matroid (for a field F) is a matroid that has a representation using a vector space over F. Matroid representation theory studies the existence of representations and the properties of linear matroids.

Mats Daehli

Matryoshka (song)

Matronage

Matrix theory

Matrícula de Tributos

Matron literature

Matroesjka's

Mats Israelsson

Mats G. Nilsson

Mats Helge Olsson

Matrixial gaze

Mats Johansson (sailor)

Mats Bolmstedt

Matryoshka Radio London is an independent commercial music radio station. On air 24/7, Matryoshka Radio London is the first Russian language radio station to have secured a British broadcasting licence. It has been broadcasting on digital audio broadcasting (DAB) in London since 27 November, 2015. Matryoshka's logo represents a stylised matryoshka doll sporting headphones and the name of the station, Matryoshka Radio London, as well as the technology it broadcasts in, DAB.

Matrix transposition

Matron Stakes (USA)

Matron Stakes (disambiguation)

Mats Ericson

Matryona Ivanovna Balk (née Modesta Mons; fl. 1718), was a Russian courtier. She was a lady-in-waiting and confidant of Catherine I of Russia, Ober-Hofmeisterin of Tsarevna Catherine Ivanovna of Russia and sister of Anna Mons. She was accused in 1718 for having assisted the empress in her love affair with Willem Mons.

Matrix vector multiplication

Matroid parity problem

Matrixx v. Siracusano

Mats Helge, also known as Mats-Helge Olsson (born 10 May 1953) is a Swedish independent filmmaker, best known for movies such as The Ninja Mission (1984), and he is one of the most productive independent Swedish directors ever, with almost 100 titles to his résumé. He began his career with movies in the 1970s with movies the press called "lingonwesterns". He also directed "I Död mans spår", with Carl-Gustaf Lindstedt and a couple of six-shooters, shot in High Chaparral in Småland, Sweden. Then he made candid camera with Per Oscarsson in Lidköping, and The Ninja Mission.

Mats Aronsson

Matrons

Matrox Marvel G450 eTV

In combinatorics, a matroid embedding is a set system (F, E), where F is a collection of feasible sets, that satisfies the following properties: 1.
* (Accessibility Property) Every non-empty feasible set X contains an element x such that X\{x} is feasible; 2.
* (Extensibility Property) For every feasible subset X of a basis (i.e., maximal feasible set) B, some element in B but not in X belongs to the extension ext(X) of X, where ext(X) is the set of all elements e not in X such that X∪{e} is feasible; 3.
* (Closure-Congruence Property) For every superset A of a feasible set X disjoint from ext(X), A∪{e} is contained in some feasible set for either all or no e in ext(X); 4.
* The collection of all subsets of feasible sets forms a matroid. Matroid embedding was introduced by to characterize problems that can be optimized by a greedy algorithm.

Matrona (genus)

Matron

In statistics, the matrix variate beta distribution is a generalization of the beta distribution. If is a positive definite matrix with a matrix variate beta distribution, and are real parameters, we write (sometimes ). The probability density function for is: Here is the : where is the multivariate gamma function given by

Matrona of Thessaloniki

Mats Gustafsson (born 12 December 1975 in Sund, Åland) is a Finnish former footballer. During his career he represented IFK Mariehamn, FC Inter Turku and VG-62. 2007 was his last season of professional football as he wanted to spend more time at home with his family.

Matrixx Initiatives, Inc. v. Siracusano

In combinatorial optimization, the matroid parity problem is a problem of finding the largest independent set of paired elements in a matroid. The problem was formulated by as a common generalization of graph matching and matroid intersection. It is also known as polymatroid matching, or the matchoid problem. Matroid parity can be solved in polynomial time for linear matroids. However, it is NP-hard for certain compactly-represented matroids, and requires more than a polynomial number of steps in the matroid oracle model.

Matron Stakes

Mats Hessel

Matrix table tennis

Matrona (damselfly)

Matrones

Matronit

Matrona oreades

Matrox Mystique

In mathematics, a matrix unit is an idealisation of the concept of a matrix, with a focus on the algebraic properties of matrix multiplication. The topic is comparatively obscure within linear algebra, because it entirely ignores the numeric properties of matrices; it is mostly encountered in the context of abstract algebra, especially the theory of semigroups. Despite the name, matrix units are not the same as unit matrices or unitary matrices. Two matrices can be multiplied when the number of columns in one is the same as the number of rows in the other; otherwise, they are incompatible. The idea behind matrix units is to look at this fact in isolation: a matrix unit is a matrix with dimensions, but with the entries scooped out. Let I be a nonempty set, to be used for counting the matrix rows and columns. There is no requirement for it to be finite; indeed, standard matrix algebra would use the set of natural numbers (not including zero) N+. A matrix unit is either an ordered pair (r, c), with r and c elements of I, or it is a special "zero" object, written as "0". Multiplication is defined as follows:
* 0 x = x 0 = 0 for any matrix unit x;
* (r, c) (s, d) = (r, d) if c = s, and 0 if c ≠ s. The 0 element can be seen as an "error symbol" for when multiplication fails; the first rule implies that errors propagate through an entire product containing a single incompatible combination. For example, the product (with I = N+) (2, 3) (3, 2) (2, 1) (1, 4) = (2, 4) represents the abstract matrix multiplication Another notation for (r, c) is Ar c, following the convention for naming a single entry of a matrix. (Different letters are used in the "A" position to refer to matrix units on a different base set.) The composition rule may be expressed using the Kronecker delta as Xr c Xs d = δc s Xr d. With these rules, (I × I) ∪ {0} is a semigroup with zero. Its construction is analogous to that for other important semigroups, such as rectangular bands and Rees matrix semigroups. It also arises as the of the unique D-class of the bicyclic semigroup, meaning that it summarises how composition for members of that class interacts with the structure of the semigroup's principal ideals. A semigroup of matrix units is 0-simple, because any two nonzero elements generate the same two-sided ideal (the entire semigroup), and the semigroup is non-null. The elements (r, c) and (s, d) are D-related via (r, c) R (r, d) L (s, d), as any pairs are R-related if they have the same first coordinate and L-related if they have the same second coordinate. All H-classes are singletons. The idempotents are the "square" matrix units (a, a) for a in I, together with 0.

Matron is the job title of a very senior or the chief nurse in several countries, including the United Kingdom, its former colonies, such as India, and also the Republic of Ireland. The chief nurse, in other words the person in charge of nursing in a hospital and the head of the nursing staff, is also known as the Senior Nursing Officer, matron, nursing officer, or clinical nurse manager in UK English; the head nurse or director of nursing in US English, and the nursing superintendent or matron in Indian English, among other countries in the Commonwealth of Nations.

Matrix unguis

Mats Björke

Matrix universe

Matrosov