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algebraic threefold

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  • Cubic threefold — In algebraic geometry, a cubic threefold is a hypersurface of degree 3 in 4 dimensional projective space. Cubic threefolds are all unirational, but Clemens Griffiths (1972) used intermediate Jacobians to show that non singular cubic threefolds… …   Wikipedia

  • Rules of chess — The rules of chess (also known as the laws of chess) are rules governing the play of the game of chess. While the exact origins of chess are unclear, modern rules first took form during the Middle Ages. The rules c …   Wikipedia

  • Segre embedding — In mathematics, the Segre embedding is used in projective geometry to consider the cartesian product of two or more projective spaces as a projective variety. It is named after Corrado Segre. Contents 1 Definition 2 Discussion 3 Properties …   Wikipedia

  • Glossary of chess — See also: Outline of chess and Glossary of chess problems This page explains commonly used terms in chess in alphabetical order. Some of these have their own pages, like fork and pin. For a list of unorthodox chess pieces, see fairy chess… …   Wikipedia

  • List of chess terms — This page explains commonly used terms in chess in alphabetical order. Some of these have their own pages, like fork and pin. For a list of unorthodox chess pieces, see fairy chess piece; for a list of terms specific to chess problems, see chess… …   Wikipedia

  • Glossary of scheme theory — This is a glossary of scheme theory. For an introduction to the theory of schemes in algebraic geometry, see affine scheme, projective space, sheaf and scheme. The concern here is to list the fundamental technical definitions and properties of… …   Wikipedia

  • World Chess Championship 1972 — The World Chess Championship 1972 was a match between challenger Bobby Fischer of the United States and defending champion Boris Spassky of the Soviet Union for the World Chess Championship. The match took place in the Laugardalshöll arena in… …   Wikipedia

  • chess — chess1 /ches/, n. a game played by two persons, each with 16 pieces, on a chessboard. [1150 1200; ME < OF esches, pl. of eschec CHECK1] chess2 /ches/, n., pl. chess, chesses. one of the planks forming the roadway of a floating bridge. [1425 75;… …   Universalium

  • Outline of chess — A game of chess, in the starting position. See also: Glossary of chess and Index of chess articles The following outline is provided as an overview of and topical guide to chess: Chess – two player board game played on a chessboard, a square …   Wikipedia

  • Cubic form — In mathematics, a cubic form is a homogeneous polynomial of degree 3, and a cubic hypersurface is the zero set of a cubic form. In (Delone Faddeev 1964), Boris Delone and Dmitriĭ Faddeev showed that binary cubic forms with integer coefficients… …   Wikipedia

  • Donaldson–Thomas theory — In mathematics, specifically algebraic geometry, Donaldson–Thomas theory is the theory of Donaldson–Thomas invariants. Given a compact moduli space of sheaves on a Calabi–Yau threefold, its Donaldson–Thomas invariant is the virtual number of its… …   Wikipedia

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