Generalized Weyl's theorems for polaroid operators

Abstract:

In this paper we establish necessary and sufficient conditions on bounded linear operators for which generalized Weyl's theorem, or generalized a-Weyl theorem, holds. We also consider generalized Weyl's theorems in the framework of polaroid operators and obtain improvements of some results recently established in [20] and [29].

Año de publicación:

2011

Keywords:

• Semi B-Fredholm operator
• Generalized Weyl's theorems
• Polaroid operators

Fuente:

scopus