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Change of the *congruence canonical form of 2-by-2 matrices under perturbations (1304.5762v1)
Published 21 Apr 2013 in math.RT
Abstract: We study how small perturbations of a 2-by-2 complex matrix can change its canonical form for *congruence. We construct the Hasse diagram for the closure ordering on the set of *congruence classes of 2-by-2 matrices.
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