Unitary equivalence to a complex symmetric matrix: an algorithm

Details Unitary equivalence to a complex symmetric matrix: an algorithm Unitary equivalence to a complex symmetric matrix: an algorithm

2009-08-15

arxiv.org/abs/0908.2201v1

J. Math. Anal. Appl. 341 (2008) 640-648

Mathematics

Functional Analysis

10 pages

Scientific paper

We present a necessary and sufficient condition for a 3 by 3 matrix to be unitarily equivalent to a symmetric matrix with complex entries, and an algorithm whereby an arbitrary 3 by 3 matrix can be tested. This test generalizes to a necessary and sufficient condition that applies to almost every n by n matrix. The test is constructive in that it explicitly exhibits the unitary equivalence to a complex symmetric matrix.

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