ON QUASI COMULTIPLICATION MODULES OVER PULLBACK RINGS

Abstract

We classify all indecomposable quasi comultiplication modules

over pullback of two Dedekind domains. We extend the denitions and the

results of comultiplication modules over pullback rings to a more general quasi

comultiplication modules case.

Keywords

• Pullback,separated module,quasi comultiplication module,Dedekind domain,pure-injective module

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