Approximate diagonalization of self--adjoint matrices over $C(M)$

Details Approximate diagonalization of self--adjoint matrices over $C(M)$ Approximate diagonalization of self--adjoint matrices over $C(M)$

2010-02-21

arxiv.org/abs/1002.3962v1

Mathematics

Functional Analysis

11 pages

Scientific paper

Let $M$ be a compact Hausdorff space. We prove that in this paper, every self--adjoint matrix over $C(M)$ is approximately diagonalizable iff $\dim M\le 2$ and $\HO^2(M,\mathbb Z)\cong 0$. Using this result, we show that every unitary matrix over $C(M)$ is approximately diagonalizable iff $\dim M\le 2$, $\HO^1(M,\mathbb Z)\cong\HO^2(M,\mathbb Z)\cong 0$ when $M$ is a compact metric space.

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