FORME RELATIVE DE CONTINUITÉ ET DE COMPACITÉ POUR LES OPÉRATEURS DIFFÉRENTIELS

Loading...
Thumbnail Image

Date

2020-09

Journal Title

Journal ISSN

Volume Title

Publisher

Université de M'sila

Abstract

In this thesis whenever, A and B are semi regular operators does not imply, in general, that the product AB is semi regular. We do, however, give conditions under which the above implication is valid. Moreover, we study the essential approximate point spectrum (respectively, the essential defect spectrum) of a sequence of closed linear operators (T_{n})_{n∈N} on Banach space X, and the essential approximate point spectrum (respectively, the essential defect spectrum) of a linear operator T on X, where (T_{n})_{n∈N} converges to T, in the case of convergence in generalized sense as well as in the case of the convergence compactly. And in the last we applied some results of spectral continuity using the v-convergence to 𝟑 × 𝟑 block operator matrix.

Description

Keywords

Semi regular operator, convergence in the generalized sense, convergence compactly, v-convergence ملخص:

Citation