Pseudo-contractibility and pseudo-amenability of semigroup algebras
2011
In this paper, we characterize pseudo-contractibility of l 1(S), where S is a uniformly locally finite inverse semigroup. As a consequence, we show that for a Brandt semigroup \({S={\mathcal{M}}^{0}(G,I),}\) the semigroup algebra l 1(S) is pseudo-contractible if and only if G and I are finite. Moreover, we study the notions of pseudo-amenability and pseudo-contractibility of a semigroup algebra l 1(S) in terms of the amenability of S.
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