Linear maps transforming H-unitary matri
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Chi-Kwong Li; Nung-Sing Sze
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Article
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2004
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Elsevier Science
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English
β 238 KB
Let H 1 be an n Γ n invertible Hermitian matrix, and let U(H 1 ) be the group of n Γ n H 1 -unitary matrices, i.e., matrices A satisfying A \* H 1 A = H 1 . Suppose H 2 is an m Γ m invertible Hermitian matrix. We show that a linear transformation Ο : and Ο has the form where a, b, c and d are nonn