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Approximate biprojectivity of certain semigroup algebras

Authors
  • Sahami, A.
  • Pourabbas, A.
Type
Preprint
Publication Date
Sep 26, 2014
Submission Date
Sep 26, 2014
Identifiers
arXiv ID: 1409.7515
Source
arXiv
License
Yellow
External links

Abstract

In this paper, we investigate the notion of approximate biprojectivity for semigroup algebras and for some Banach algebras related to semigroup algebras. We show that $\ell^{1}(S)$ is approximately biprojective if and only if $\ell^{1}(S)$ is biprojective, provided that $S$ is a uniformly locally finite inverse semigroup. Also for a Clifford semigroup $S$, we show that approximate biprojectivity $\ell^{1}(S)^{**}$ gives pseudo amenability of $\ell^{1}(S)$. We give a class of Banach algebras related to semigroup algebras which is not approximately biprojective.

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