# Preserving

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**Super vector space**— In mathematics, a super vector space is another name for a Z2 graded vector space, that is, a vector space over a field K with a given decomposition:V=V 0oplus V 1.The study of super vector spaces and their generalizations is sometimes called… …92

**Collineation**— In projective geometry, a collineation is a one to one and onto map (a bijection) from one projective space to another, or from a projective space to itself, such that the images of collinear points are themselves collinear. All projective linear …93

**National Digital Information Infrastructure and Preservation Program**— The National Digital Information Infrastructure and Preservation Program (NDIIPP) is an archival program led by the Library of Congress to archive and provide access to digital resources. The U.S. Congress established the program in 2000. The… …94

**Mark B. Cohen**— For other uses, see Mark Cohen (disambiguation). Mark B. Cohen Member of the Pennsylvania House of Representatives from the 202nd district Incumbent Assumed office 1974 Preceded by Eugene Gelfand …95

**Germany**— /jerr meuh nee/, n. a republic in central Europe: after World War II divided into four zones, British, French, U.S., and Soviet, and in 1949 into East Germany and West Germany; East and West Germany were reunited in 1990. 84,068,216; 137,852 sq.… …96

**Europe, history of**— Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …97

**Midtown Farmers' Market**— The Midtown Farmers Market is a seasonal open air farmers market in the Midtown area of south Minneapolis. Established in 2003, the market is held Saturdays from May through October, and Tuesdays from June through October in a parking lot in the… …98

**Orientation (vector space)**— See also: orientation (geometry) The left handed orientation is shown on the left, and the right handed on the right. In mathematics, orientation is a notion that in two dimensions allows one to say when a cycle goes around clockwise or… …99

**Homomorphism**— In abstract algebra, a homomorphism is a structure preserving map between two algebraic structures (such as groups, rings, or vector spaces). The word homomorphism comes from the Greek language: ὁμός (homos) meaning same and μορφή (morphe)… …100

**Isomorphism**— In abstract algebra, an isomorphism (Greek: ἴσος isos equal , and μορφή morphe shape ) is a bijective map f such that both f and its inverse f −1 are homomorphisms, i.e., structure preserving mappings.In the more general setting of category… …