A discrete approach for the inverse singular value problem in some quadratic group

Authors:
T. Politi
Affiliations:
Dipartimento Interuniversitario di Matematica, Politecnico di Bari, Bari, Italy
Venue:
ICCS'03 Proceedings of the 2003 international conference on Computational science: PartII
Year:
2003

Citing 4
Cited 1

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Parameterized inverse singular value problem for anti-bisymmetric matrices

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Abstract

In this paper the solution of an inverse singular value problem is considered. First the decomposition of a real square matrix A = UΣV is introduced, where U and V are real square matrices orthogonal with respect to a particular inner product defined through a real diagonal matrix G of order n having all the elements equal to ±1, and Σ is a real diagonal matrix with nonnegative elements, called G-singular values. When G is the identity matrix this decomposition is the usual SVD and Σ is the diagonal matrix of singular values. Given a set {σ1,..., σn} of n real positive numbers we consider the problem to find a real matrix A having them as G-singular values. Neglecting theoretical aspects of the problem, we discuss only an algorithmic issue, trying to apply a Newton type algorithm already considered for the usual inverse singular value problem.