# Publishing house / Banach Center Publications / All volumes

## Back to RS-SR spectral theory

### Volume 75 / 2007

Banach Center Publications 75 (2007), 55-66 MSC: Primary 47A11, 47A10. DOI: 10.4064/bc75-0-4

#### Abstract

Let $X, Y$ be Banach spaces, $S: X \to Y$ and $R: Y \to X$ be bounded operators. We investigate common spectral properties of $RS$ and $SR$. We then apply the result obtained to extensions, Aluthge transforms and upper triangular operator matrices.

#### Authors

• C. BenhidaUniversité de Lille 1
UFR de Mathématiques
CNRS-UMR 8524
Bât. M2
59655 Villeneuve Cedex
France
e-mail
• E. H. ZeroualiFaculté des Sciences de Rabat
BP 1014 Rabat
Morocc
e-mail

## Search for IMPAN publications

Query phrase too short. Type at least 4 characters.