$varphi$-CONNES MODULE AMENABILITY OF DUAL BANACH ALGEBRAS

Authors

  • A. Ghaffari Department of Mathematics, University of Semnan, P.O. Box 35195-363, Semnan, Iran.
  • E. Tamimi Department of Mathematics, University of Semnan, P.O. Box 35195-363, Semnan, Iran.
  • S. Javadi Syahkale Faculty of Engineering- East Guilan, University of Guilan, P.O. Box 44891-63157, Rudsar, Iran.
Abstract:

In this paper we define $varphi$-Connes module amenability of a dual Banach algebra $mathcal{A}$ where $varphi$ is a bounded $w_{k^*}$-module homomorphism from $mathcal{A}$ to $mathcal{A}$. We are mainly concerned with the study of $varphi$-module normal virtual diagonals. We show that if $S$ is a weakly cancellative inverse semigroup with subsemigroup $E$ of idempotents, $chi$ is a bounded $w_{k^*}$-module homomorphism from $l^1(S)$ to $l^1(S)$ and $l^1(S)$ as a Banach module over $l^1(E)$ is $chi$-Connes module amenable, then it has a $chi$-module normal virtual diagonal. In the case $chi=id$, the converse holds

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Journal title

volume 8  issue 1

pages  69- 82

publication date 2020-09-01

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