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| | The Numerical Range of a Weighted Shift (Site not responding. Last check: 2007-10-08) |
 | | Abstract: Let T be a weighted shift operator on a Hilbert space. |
 | | We compute the numerical radius of T when T is finite, circular, Hilbert-Schmidt, periodic, or a finite perturbation of periodic. |
 | | Keywords: weighted unilateral or bilateral shift, Hilbert space, numerical radius, numerical range, tri-diagonal matrix, circular shift, circularly symmetric functions, operator theory, mathematics, analysis |
| www.eecs.umich.edu /~qstout/abs/PAMS83.html (125 words) |
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