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Quartically hyponormal weighted shifts need not be 3-hyponormal |
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| Authors: | Raú l E. Curto,Sang Hoon Lee |
| Affiliation: | Department of Mathematics, The University of Iowa, Iowa City, IA 52242, USA |
| Abstract: | We give the first example of a quartically hyponormal unilateral weighted shift which is not 3-hyponormal. |
| Keywords: | k-Hyponormal Weakly k-hyponormal Weighted shift |
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