Mathematics – Algebraic Topology
Scientific paper
2009-11-10
Mathematics
Algebraic Topology
7 pages
Scientific paper
Given $n$ integer, let $X$ be either the set of hermitian or real $n\times n$
matrices of rank at least $n-1$. If $n$ is even, we give a sharp estimate on
the maximal dimension of a real vector subspace of $X\cup\{0\}$. The rusults
are obtained, via K-theory, by studying a bundle map induced by the adjugation
of matrices
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