Quartically hyponormal weighted shifts need not be 3-hyponormal
Functional Analysis
2007-05-23 v1 Operator Algebras
Abstract
We give the first example of a quartically hyponormal unilateral weighted shift which is not 3-hyponormal.
Cite
@article{arxiv.math/0610887,
title = {Quartically hyponormal weighted shifts need not be 3-hyponormal},
author = {Raul E. Curto and Sang Hoon Lee},
journal= {arXiv preprint arXiv:math/0610887},
year = {2007}
}
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