Semigroup Forum, ( ISI ), Volume (92), No (1), Year (2016-1) , Pages (304-310)

Title : ( Arens regularity of certain weighted semigroup algebras and countability )

Authors: Hamid Reza Ebrahimi Vishki , Bahram Khodsiani , Ali Rejali ,

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In this paper, among other things, we show that for a large class of semi-groups, the Arens regularity of the weighted semigroup algebra ℓ1(S,w) implies the countability of S. This generalizes the main results of Craw and Young [Quart. J. Math.25 (1974), 351-358], stating that every countable semigroup admits a weight w for which ℓ1(S,w) is Arens regular and no uncountable group admits such a weight.

Keywords

Arens regularity; weighted semigroup algebra; completely simple semigroup; inverse
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@article{paperid:1052916,
author = {Ebrahimi Vishki, Hamid Reza and Bahram Khodsiani and Ali Rejali},
title = {Arens regularity of certain weighted semigroup algebras and countability},
journal = {Semigroup Forum},
year = {2016},
volume = {92},
number = {1},
month = {January},
issn = {0037-1912},
pages = {304--310},
numpages = {6},
keywords = {Arens regularity; weighted semigroup algebra; completely simple semigroup; inverse semigroup.},
}

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%0 Journal Article
%T Arens regularity of certain weighted semigroup algebras and countability
%A Ebrahimi Vishki, Hamid Reza
%A Bahram Khodsiani
%A Ali Rejali
%J Semigroup Forum
%@ 0037-1912
%D 2016

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