Geodesic
a-Weyl's theorem and perturbations
Mourad Oudghiri1
1 UFR de Mathématiques Université Lille 1 UMR-CNRS 8524 59655 Villeneuve d'Ascq, France
Studia Mathematica, Tome 173 (2006) no. 2, pp. 193-201

Voir la notice de l'article provenant de la source Institute of Mathematics Polish Academy of Sciences

We study the stability of a-Weyl's theorem under perturbations by operators in some known classes. We establish in particular that if $T$ is a finite a-isoloid operator, then a-Weyl's theorem is transmitted from $T$ to $T+R$ for every Riesz operator $R$ commuting with $T$.
DOI : 10.4064/sm173-2-6
Keywords: study stability a weyls theorem under perturbations operators known classes establish particular finite a isoloid operator a weyls theorem transmitted every riesz operator commuting

Mourad Oudghiri 1

1 UFR de Mathématiques Université Lille 1 UMR-CNRS 8524 59655 Villeneuve d'Ascq, France 
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Mourad Oudghiri. a-Weyl's theorem and perturbations. Studia Mathematica, Tome 173 (2006) no. 2, pp. 193-201. doi: 10.4064/sm173-2-6

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