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JMB Journal of Microbiolog and Biotechnology

OPEN ACCESS eISSN 0454-8124
pISSN 1225-6951
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Original Article

Kyungpook Mathematical Journal 2013; 53(2): 185-189

Published online June 23, 2013

Copyright © Kyungpook Mathematical Journal.

A Class of Invertible Bilateral Weighted Shifts

Il Bong Jung1 , Carl Pearcy2

1 Department of Mathematics, Kyungpook National University, Daegu, 702-701, Korea
2 Department of Mathematics, Texas A&M University, College Station, TX 77843, USA

Abstract

In this note we study a class of invertible weighted bilateral shifts on Hilbert space introduced by Haskell Rosenthal recently. We show that every Rosenthal shift is unitarily equivalent to its inverse, not quasisimilar to its adjoint, and has a nontrivial hyperinvariant subspace.

Keywords: bilateral shift, Rosenthal shift, hyperinvariant subspace