Canonical forms for complex matrix congruence and ∗congruence
Copyright policy )Canonical forms for complex matrix congruence and ∗congruence
Canonical forms for congruence and *congruence of square complex matrices were given by Horn and Sergeichuk in [Linear Algebra Appl. 389 (2004) 347-353], based on Sergeichuk's paper [Math. USSR, Izvestiya 31 (3) (1988) 481-501], which employed the theory of representations of quivers with involution. We use standard methods of matrix analysis to prove directly that these forms are canonical. Our proof provides explicit algorithms to compute all the blocks and parameters in the canonical forms. We use these forms to derive canonical pairs for simultaneous congruence of pairs of complex symmetric and skew-symmetric matrices as well as canonical forms for simultaneous *congruence of pairs of complex Hermitian matrices.
31 pages
- University of Utah United States
- National Academy of Sciences of Ukraine Ukraine
- Institute of Mathematics Ukraine
- UNIVERSITY OF UTAH United States
Canonical forms, reductions, classification, Bilinear and Hermitian forms, \(^\star\)congruence, 15A63, 15A21, Canonical forms, canonical form, FOS: Mathematics, Discrete Mathematics and Combinatorics, bilinear form, Representation Theory (math.RT), 15A21; 15A63, Canonical pairs, canonical pair, Numerical Analysis, Algebra and Number Theory, sesquilinear form, congruence, Congruence, ∗Congruence, Bilinear forms, Sesquilinear forms, Geometry and Topology, Quadratic and bilinear forms, inner products, Mathematics - Representation Theory
Canonical forms, reductions, classification, Bilinear and Hermitian forms, \(^\star\)congruence, 15A63, 15A21, Canonical forms, canonical form, FOS: Mathematics, Discrete Mathematics and Combinatorics, bilinear form, Representation Theory (math.RT), 15A21; 15A63, Canonical pairs, canonical pair, Numerical Analysis, Algebra and Number Theory, sesquilinear form, congruence, Congruence, ∗Congruence, Bilinear forms, Sesquilinear forms, Geometry and Topology, Quadratic and bilinear forms, inner products, Mathematics - Representation Theory
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