totally isotropic subspace
1Degenerate form — For other uses, see Degeneracy. In mathematics, specifically linear algebra, a degenerate bilinear form ƒ(x,y) on a vector space V is one such that the map from V to V * (the dual space of V) given by is not an isomorphism. An equivalent… …
2Polar space — In mathematics, in the field of combinatorics, a polar space of rank n ( n ge; 3), or projective index n −1, consists of a set P , conventionally the set of points, together with certain subsets of P , called subspaces , that satisfy these axioms …
3Quadratic form — In mathematics, a quadratic form is a homogeneous polynomial of degree two in a number of variables. For example, is a quadratic form in the variables x and y. Quadratic forms occupy a central place in various branches of mathematics, including… …
