Iskanje po katalogu digitalne knjižnice

Opis: Semigroups of normal complex square matrices having a finite spectrum are studied. It is shown that every mamber ▫$A$▫ of such a semigroup satisfies the condition ▫$A^ast = A^n$▫, where ▫$n$▫ does not depend on the matrix ▫$A$▫. Further, it is shown that such a semigroup is completely reducible, and each irreducible contraction consists of a group of unitary matrices and, aventually, the zero matrix.
Ključne besede: mathematics, matrix theory, normal matrices, spectrum, semigroups, reducability
Objavljeno: 01.06.2012; Ogledov: 883; Prenosov: 48
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