Inner derivations and norm equality
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- by Mohamed Barraa and Mohamed Boumazgour PDF
- Proc. Amer. Math. Soc. 130 (2002), 471-476 Request permission
Abstract:
We characterize when the norm of the sum of two bounded operators on a Hilbert space is equal to the sum of their norms.References
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Additional Information
- Mohamed Barraa
- Affiliation: Département de Mathématiques, Faculté des sciences Semlalia B.P: 2390 Marrakech, Maroc
- Email: barraa@hotmail.com
- Mohamed Boumazgour
- Affiliation: Département de Mathématiques, Faculté des sciences Semlalia B.P: 2390 Marrakech, Maroc
- Email: boumazgour@hotmail.com
- Received by editor(s): December 3, 1999
- Received by editor(s) in revised form: June 27, 2000
- Published electronically: May 25, 2001
- Communicated by: Joseph A. Ball
- © Copyright 2001 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 130 (2002), 471-476
- MSC (1991): Primary 47A10, 47A12, 47A30, 47B10, 47B20, 47B37, 47B47, 47D50
- DOI: https://doi.org/10.1090/S0002-9939-01-06053-1
- MathSciNet review: 1862127