C*-Algebra numerical range of quadratic elements

Author(s):

M. T. Heydari

Message:
Abstract:
It is shown that the result of Tso-Wu on the elliptical shape of the numerical range of quadratic operators holds also for the C*-algebra numerical range.
Language:
English
Published:
Iranian Journal of Mathematical Sciences and Informatics, Volume:5 Issue: 1, May 2010
Page:
49
https://www.magiran.com/p731598