Barbara Glanc, Aleksander Misiak, Zofia Stepien, Instytut Matematyki, Politechnika Szczecinska, Al. Piastow 17, 70-310 Szczecin, e-mail: misiak@ps.pl
Abstract: In this note all vectors and $\varepsilon$-vectors of a system of $m\leq n$ linearly independent contravariant vectors in the $n$-dimensional pseudo-Euclidean geometry of index one are determined. The problem is resolved by finding the general solution of the functional equation $F( A{\underset1\to u}, A{\underset2\to u},\dots,A{\underset m\to u}) =( \det A)^{\lambda}\cdot A\cdot F( {\underset1\to u},{\underset2\to u},\dots, {\underset m\to u})$ with $\lambda=0$ and $\lambda=1$, for an arbitrary pseudo-orthogonal matrix $A$ of index one and given vectors $ {\underset1\to u},{\underset2\to u},\dots,{\underset m\to u}.$
Keywords: $G$-space, equivariant map, pseudo-Euclidean geometry
Classification (MSC 2000): 53A55
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