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http://dx.doi.org/10.4134/BKMS.2015.52.2.439

NEW BROWDER AND WEYL TYPE THEOREMS  

Berkani, Mohammed (Department of mathematics Operator Theory Team Science Faculty of Oujda University Mohammed I)
Kachad, Mohammed (Department of mathematics Operator Theory Team Science Faculty of Oujda University Mohammed I)
Publication Information
Bulletin of the Korean Mathematical Society / v.52, no.2, 2015 , pp. 439-452 More about this Journal
Abstract
In this paper we introduce and study the new properties ($W_{\Pi}$), ($UW_{{\Pi}_a}$), ($UW_E$) and ($UW_{\Pi}$). The main goal of this paper is to study relationship between these new properties and other Weyl type theorems. Moreover, we reconsider several earlier results obtained respectively in [11], [18], [14], [1] and [13] for which we give stronger versions.
Keywords
property ($W_{\Pi}$); property ($UW_{{\Pi}_a}$); property ($UW_{\Pi}$); property($UW_E$); Weyl-type theorems;
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