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Numerical Ranges Arising from Simple Lie Algebras

Published online by Cambridge University Press:  20 November 2018

Chi-Kwong Li  and
Tin-Yau Tam
Chi-Kwong Li
Affiliation:
Department of Mathematics, College of William and Mary, P.O. Box 8795, Williamburg, VA 23187-8795, USA email: [email protected] website: http://www.math.wm.edu/~ckli
Tin-Yau Tam
Affiliation:
Department of Mathematics, Auburn University, Auburn, AL 36849-5310, USA email: [email protected] website: http://www.auburn.edu/~tamtiny
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Abstract

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A unified formulation is given to various generalizations of the classical numerical range including the $c$-numerical range, congruence numerical range, $q$-numerical range and von Neumann range. Attention is given to those cases having connections with classical simple real Lie algebras. Convexity and inclusion relation involving those generalized numerical ranges are investigated. The underlying geometry is emphasized.

Keywords

15A6017B20numerical rangeconvexityinclusion relation
Type
Research Article
Information
Canadian Journal of Mathematics , Volume 52 , Issue 1 , 01 February 2000 , pp. 141 - 171
Copyright
Copyright © Canadian Mathematical Society 2000

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