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Paper   IPM / M / 16580
School of Mathematics
  Title:   A note on weak amenability of semigroup algebras
  Author(s):  Maedeh Soroushmehr
  Status:   To Appear
  Journal: Semigroup Forum
  Supported by:  IPM
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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