Zum Aussen- und Innengebiet von Quadriken

A point X of a projective space Pⁿ (over a commutative field of characteristic 2) is called an outer point of a quadric Q^n–1 if and only if X is not a point of Q^n–1 and the polar hyperplane _X contains a maximal subspace of Q^n–1; the points of PⁿQ^n–1 which are not outer points of Q^n–1 are called inner points of Q^n–1. This definition is motivated by special cases in classical projective geometry; it improves earlier definitions.

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Herrn Prof. Dr. Martin Barner zum 65. Geburtstag gewidmet