1. CMB 2008 (vol 51 pp. 86)
||The Numerical Range of 2-Dimensional Krein Space Operators |
The tracial numerical range of operators on a $2$-dimensional
Krein space is investigated. Results in the vein
of those obtained in the context of Hilbert
spaces are obtained.
Keywords:numerical range, generalized numerical range, indefinite inner product space
Categories:15A60, 15A63, 15A45