A Study of Numerical Ranges of Operators and Matrices
博士 === 國立交通大學 === 應用數學系所 === 99 === In this thesis, we study properties of the numerical ranges of some operators and matrices. First, we consider $C_0$ contractions and quadratic operators. We show that if $A$ is a $C_0$ contraction with minimal function $\phi$ such that $w(A)=w(S(\phi))$ and if $...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | en_US |
| Published: |
2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/00947410908861101701 |