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Acta Mathematica Vietnamica

On Approximately σ-biflat Banach Algebras

Sanaz Haddad Sabzevar , icon-email Amin Mahmoodi

Abstract

We define and study approximate versions of σ-biflatness and σ-biprojectivity of a Banach algebra A where σ ∈Hom(A). We generalize the concepts pseudo amenability and pseudo contractibility via homomorphisms. We investigate their relations.