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versão On-line ISSN 0719-0646


MAHER, Philip J  e  SAL MOSLEHIAN, Mohammad. More on Approximate Operators. Cubo [online]. 2012, vol.14, n.1, pp. 111-117. ISSN 0719-0646.

This note is a continuation of the work on (p; Descripción: http://fbpe/img/cubo/v14n1/art09-03.jpg)-approximate operators studied by Mirzavaziri, Miura and Moslehian. [4]. We investigate approximate partial isometries and approximate generalized inverses. We also prove that if T is an invertible contraction satisfying Descripción: http://fbpe/img/cubo/v14n1/art09-01.jpg. Then there exists a partial isometry V such that Descripción: http://fbpe/img/cubo/v14n1/art09-02.jpg.

Palavras-chave : Hilbert space; approximation; unitary; partial isometry; polar decomposition; p; Descripción: http://fbpe/img/cubo/v14n1/art09-03.jpg)-approximate operator.

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