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- Publisher
- Wiley
- Copyright
- Copyright © 2017 Wiley Subscription Services, Inc., A Wiley Company
- ISSN
- 1617-7061
- eISSN
- 1617-7061
- DOI
- 10.1002/pamm.201710395
- Publisher site
- See Article on Publisher Site
Abstract
In this note we report on the recently introduced concept of the numerical range of a bounded linear operator on a Hilbert space with respect to a family of projections. The importance of this new concept lies in the fact that it unifies and generalizes well‐established versions of the numerical range such as the classical numerical range introduced by Toeplitz and Hausdorff, the quadratic numerical range as well as the block numerical range. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Journal
Proceedings in Applied Mathematics & Mechanics – Wiley
Published: Dec 1, 2017