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|Paper IPM / M / 16580||
We study weak amenability of certain classes of commutative semigroup algebras. First, we present a class of commutative semigroups which their semigroup algebras (like arbitrary group algebras) are always 2n-weakly amenable. Weak amenability of l1(S) in terms of regular and irregular subsets of a commutative semigroup S is also studied.
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