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A Survey of Some Results on Subnormal Operators,In this paper some results on subnormal operators will be presented. Some of these results are to be found in my book . , hereafter referred to as .. In addition some of the developments that have taken place since that book was written will also be discussed.RECUR 发表于 2025-3-22 18:15:47
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Cyclic Vectors in Banach Spaces of Analytic Functions,n it is of interest to describe the cyclic vectors for this operator, that is, those functions in the space with the property that the polynomial multiples of the function are dense. A necessary condition is that the function have no zeros; in general it is difficult to give necessary and sufficient conditions.