Topological classification of systems of bilinear and sesquilinear forms

preprint2016arXivOpen access

Abstract

Let A\cal A and B\cal B be two systems consisting of the same vector spaces Cn1,…,Cnt\mathbb C^{n_1},\dots,\mathbb C^{n_t} and bilinear or sesquilinear forms Ai,Bi:Cnk(i)×Cnl(i)→CA_i,B_i:\mathbb C^{n_{k(i)}}\times\mathbb C^{n_{l(i)}}\to\mathbb C, for i=1,…,si=1,\dots,s. We prove that A\cal A is transformed to B\cal B by homeomorphisms within Cn1,…,Cnt\mathbb C^{n_1},\dots,\mathbb C^{n_t} if and only if A\cal A is transformed to B\cal B by linear bijections within Cn1,…,Cnt\mathbb C^{n_1},\dots,\mathbb C^{n_t}.

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