Johnson pseudo-contractibility of certain Banach algebras and their nilpotent ideals
classification
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johnsonbanachalgebrascertainnilpotentpseudo-contractibilitypseudo-contractiblealgebra
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In this paper, we study the notion of Johnson pseudo-contractibility for certain Banach algebras. For a bicyclic semigroup $S$, we show that $\ell^{1}(S)$ is not Johnson pseudo-contractible. Also for a Johnson pseudo-contractible Banach algebra $A$, we show that $A$ has no non-zero complemented closed nilpotent ideal.
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