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Craige Schensted
Craige Schensted (), who formally changed his name to Ea Ea, was an American physicist and mathematician who first formulated the insertion algorithm that defines the Robinson–Schensted correspondence. Under a different form, that correspondence had earlier been described by Gilbert de Beauregard Robinson in 1938, but it is due to the Schensted insertion algorithm that the correspondence has become widely known in combinatorics. Schensted also designed several board games including *Star, Star, and Y. In 1995, he changed his name to Ea, the Babylonian name for the Sumerian god Enki, and in 1999 changed it to Ea Ea. He lived on Peaks Island in Portland, Maine Portland is the largest city in the U.S. state of Maine and the seat of Cumberland County. Portland's population was 68,408 in April 2020. The Greater Portland metropolitan area is home to over half a million people, the 104th-largest metropol .... References * * * * * * External linksHome pageof Ea Ea, formerly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robinson–Schensted Correspondence
In mathematics, the Robinson–Schensted correspondence is a bijective correspondence between permutations and pairs of standard Young tableaux of the same shape. It has various descriptions, all of which are of algorithmic nature, it has many remarkable properties, and it has applications in combinatorics and other areas such as representation theory. The correspondence has been generalized in numerous ways, notably by Knuth to what is known as the Robinson–Schensted–Knuth correspondence, and a further generalization to pictures by Zelevinsky. The simplest description of the correspondence is using the Schensted algorithm , a procedure that constructs one tableau by successively inserting the values of the permutation according to a specific rule, while the other tableau records the evolution of the shape during construction. The correspondence had been described, in a rather different form, much earlier by Robinson , in an attempt to prove the Littlewood–Richardson rule. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gilbert De Beauregard Robinson
Gilbert de Beauregard Robinson, MBE (3 June 1906 – 8 April 1992) was a Canadian mathematician most famous for his work on combinatorics and representation theory of the symmetric groups, including the Robinson-Schensted algorithm. Biography Gilbert Robinson was born in Toronto in 1906. He then attended St. Andrew's College and graduated from the University of Toronto in 1927. He received his Ph.D at Cambridge where his advisor was group theorist Alfred Young. He then joined the Mathematics Department in Toronto where he served until his retirement in 1971, except for a period of wartime service in Ottawa. Robinson specialized in the study of the symmetric groups on which he became a recognized authority. In 1938 he formulated, in a paper studying the Littlewood–Richardson rule, a correspondence that would later become known as the Robinson-Schensted correspondence. He wrote some forty papers on the topic of symmetric groups. He also published ''The Foundations of Geomet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Combinatorics
Combinatorics is an area of mathematics primarily concerned with counting, both as a means and an end in obtaining results, and certain properties of finite structures. It is closely related to many other areas of mathematics and has many applications ranging from logic to statistical physics and from evolutionary biology to computer science. Combinatorics is well known for the breadth of the problems it tackles. Combinatorial problems arise in many areas of pure mathematics, notably in algebra, probability theory, topology, and geometry, as well as in its many application areas. Many combinatorial questions have historically been considered in isolation, giving an ''ad hoc'' solution to a problem arising in some mathematical context. In the later twentieth century, however, powerful and general theoretical methods were developed, making combinatorics into an independent branch of mathematics in its own right. One of the oldest and most accessible parts of combinatorics is gra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
*Star
*Star is a complex abstract strategy game by Ea Ea, a designer of Y. It is a redevelopment of his earlier game Star A star is an astronomical object comprising a luminous spheroid of plasma (physics), plasma held together by its gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked .... Notation Each cell on the game board is labeled with a three-character value ''Nxy'' according to a polar coordinate system: * ''N'' refers to the primary radial arm. There are five arms, labeled as *, S, T, A, or R, proceeding clockwise from the point of the lower right arm of the five-pointed star in the middle of the board * ''x'' refers to the ring number of the cell. The concentric rings are labeled from 1 to 10, using the rightmost digit only, with Ring 1 (''x''=1) in the center of the board and Ring 10 (''x''=0) on the perimeter of the board. * ''y'' refers to the tangential position of the cell, counted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star (board Game)
Star is a two-player abstract strategy board game developed by Craige Schensted (now Ea Ea). It was first published in the September 1983 issue of ''Games'' magazine. It is a connection game similar to ''Hex'', ''Y'', ''Havannah'', and ''TwixT''. Unlike these games, however, the result is based on a player having a higher final score rather than achieving a specific goal. He has since developed a slightly more complicated version called '' *Star'' with better balance between edge and center moves, writing "''*Star'' is what those other games wanted to be." Game rules ''Star'' is played on a board of hexagonal cells. Although the board can have any size and shape, a board with unequal edges is generally used to avoid ties. Players may not place stones on the partial hexagon border cells off the edge of the board; these are used for scoring. One player places black stones on the board; the other player places white stones. The game begins with one player placing a stone on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Y (game)
Y is an abstract strategy board game, first described by John Milnor in the early 1950s. The game was independently invented in 1953 by Craige Schensted and Charles Titus. It is a member of the connection game family inhabited by Hex, Havannah, TwixT, and others; it is also an early member in a long line of games Schensted has developed, each game more complex but also more generalized. Gameplay Y is typically played on a triangular board with hexagonal spaces; the "official" Y board has three points with five-connectivity instead of six-connectivity, but it is just as playable on a regular triangle. Schensted and Titus' book '' Mudcrack Y & Poly-Y'' has a large number of boards for play of Y, all hand-drawn; most of them seem irregular but turn out to be topologically identical to a regular Y board. As in most games of this type, one player takes the part of Black and one takes the part of White; they place stones on the board one at a time, neither removing nor moving any p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enki
, image = Enki(Ea).jpg , caption = Detail of Enki from the Adda Seal, an ancient Akkadian cylinder seal dating to circa 2300 BC , deity_of = God of creation, intelligence, crafts, water, seawater, lakewater, fertility, semen, magic, mischief , symbol = Goat, fish, goat-fish, chimera , consort = Ninhursag, Damkina , children = Marduk, Dumuzid, Ninsar, Ninkurra, Uttu, Ninti , parents = An and Nammu , Greek_equivalent = Poseidon, PrometheusStephanie West. "Prometheus Orientalized" page 147 Museum Helveticum Vol. 51, No. 3 (1994), pp. 129–149 (21 pages) Enki ( sux, ) is the Sumerian god of water, knowledge ('' gestú''), crafts (''gašam''), and creation (''nudimmud''), and one of the Anunnaki. He was later known as Ea ( akk, ) or Ae in Akkadian (Assyrian- Babylonian) religion, and is identified by some scholars with Ia in Canaanite religion. The name was rendered Aos in Greek sources (e.g. Damascius). He was originally the patron god of the city of Eridu, but la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peaks Island, Maine
Peaks Island is the most populous island in Casco Bay, Maine. It is part of the city of Portland and is approximately from downtown. The island is served by Casco Bay Lines and is home to its own elementary school, library, and police station. It is the only island in Casco Bay that allows cars throughout the island due to its size. While small, the island hosts a variety of businesses including an ice cream parlor, restaurant, grocery store, kayak rentals, golf cart rentals, art galleries, the Fifth Maine Regiment Museum and the Umbrella Cover Museum, among others. Notable visitors and places George M. Cohan tried his productions out at the island's Gem Theater before taking them to Broadway. Jean Stapleton's first professional appearance in the summer of 1941 was in a production at Greenwood Garden Playhouse. Martin Landau also made his professional stage debut in a 1951 production of "Detective Story" at Greenwood Garden where for several seasons he was a resident cast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portland, Maine
Portland is the largest city in the U.S. state of Maine and the seat of Cumberland County. Portland's population was 68,408 in April 2020. The Greater Portland metropolitan area is home to over half a million people, the 104th-largest metropolitan area in the United States. Portland's economy relies mostly on the service sector and tourism. The Old Port is known for its nightlife and 19th-century architecture. Marine industry plays an important role in the city's economy, with an active waterfront that supports fishing and commercial shipping. The Port of Portland is the second-largest tonnage seaport in New England. The city seal depicts a phoenix rising from ashes, a reference to recovery from four devastating fires. Portland was named after the English Isle of Portland, Dorset. In turn, the city of Portland, Oregon was named after Portland, Maine. The word ''Portland'' is derived from the Old English word ''Portlanda'', which means "land surrounding a harbor". The Greater ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Journal Of Mathematics
The ''Canadian Journal of Mathematics'' (french: Journal canadien de mathématiques) is a bimonthly mathematics journal published by the Canadian Mathematical Society. It was established in 1949 by H. S. M. Coxeter and G. de B. Robinson. The current editors-in-chief of the journal are Louigi Addario-Berry and Eyal Goren. The journal publishes articles in all areas of mathematics. See also * Canadian Mathematical Bulletin The ''Canadian Mathematical Bulletin'' (french: Bulletin Canadien de Mathématiques) is a mathematics journal, established in 1958 and published quarterly by the Canadian Mathematical Society. The current editors-in-chief of the journal are Antoni ... References External links * University of Toronto Press academic journals Mathematics journals Publications established in 1949 Bimonthly journals Multilingual journals Cambridge University Press academic journals Academic journals associated with learned and professional societies of Canada ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge University Press
Cambridge University Press is the university press of the University of Cambridge. Granted letters patent by Henry VIII of England, King Henry VIII in 1534, it is the oldest university press A university press is an academic publishing house specializing in monographs and scholarly journals. Most are nonprofit organizations and an integral component of a large research university. They publish work that has been reviewed by schola ... in the world. It is also the King's Printer. Cambridge University Press is a department of the University of Cambridge and is both an academic and educational publisher. It became part of Cambridge University Press & Assessment, following a merger with Cambridge Assessment in 2021. With a global sales presence, publishing hubs, and offices in more than 40 Country, countries, it publishes over 50,000 titles by authors from over 100 countries. Its publishing includes more than 380 academic journals, monographs, reference works, school and uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Board Game Designers
Board or Boards may refer to: Flat surface * Lumber, or other rigid material, milled or sawn flat ** Plank (wood) ** Cutting board ** Sounding board, of a musical instrument * Cardboard (paper product) * Paperboard * Fiberboard ** Hardboard, a type of fiberboard * Particle board, also known as ''chipboard'' ** Oriented strand board * Printed circuit board, in computing and electronics ** Motherboard, the main printed circuit board of a computer * A reusable writing surface ** Chalkboard ** Whiteboard Recreation * Board game **Chessboard **Checkerboard * Board (bridge), a device used in playing duplicate bridge * Board, colloquial term for the rebound statistic in basketball * Board track racing, a type of motorsport popular in the United States during the 1910s and 1920s * Boards, the wall around a bandy field or ice hockey rink * Boardsports * Diving board (other) Companies * Board International, a Swiss software vendor known for its business intelligence software t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_-_EnKi_(Sumerian).jpg "Click for more on -> Enki")
