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Semigroup properties of factors in the polar decomposition or the operator De-Moivre formula

Author(s): Ximena Catepillán; Waclaw Szymanski
Journal: Proc. Amer. Math. Soc. 126 (1998), 3521-3526.
MSC (1991): Primary 47B20, 47D03
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Abstract: We give necessary and sufficient conditions under which the factors in the polar decomposition of a semigroup homomorphism are themselves semigroup homomorphisms.

References:

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