Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4592804 | Journal of Functional Analysis | 2007 | 23 Pages |
Abstract
We prove an inequality related to polynomial functions of a square matrix, involving the numerical range of the matrix. We also show extensions valid for bounded and also unbounded operators in Hilbert spaces, which allow the development of a functional calculus.
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory