Quadratically Hyponormal Weighted Shifts with Recursive Tail
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01/12/2013
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Resumo |
We characterize positive quadratic hyponormality of the weighted shift W-alpha(x) associated to the weight sequence alpha(x) : 1, 1, root x, (root u, root v, root w)(Lambda) with Stampfli recursive tail, and produce an interval in x with non-empty interior in the positive real line for quadratic hyponormality but not positive quadratic hyponormality for such a shift. (C) 2013 Elsevier Inc. All rights reserved. |
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Publicador |
Bucknell Digital Commons |
Fonte |
Faculty Journal Articles |
Palavras-Chave | #Weighted shift #Quadratic hyponormality #Positive quadratic hyponormality #Applied Mathematics #Mathematics |
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text |