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Displaying similar documents to “Stenosis in dimension groups and AF C*-algebras.”

On the trivial extensions of tubular algebras

Jerzy Białkowski (2004)

Colloquium Mathematicae

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The aim of this note is to give an affirmative answer to a problem raised in [9] by J. Nehring and A. Skowroński, concerning the number of nonstable ℙ₁(K)-families of quasi-tubes in the Auslander-Reiten quivers of the trivial extensions of tubular algebras over algebraically closed fields K.

Unital extensions of A F -algebras by purely infinite simple algebras

Junping Liu, Changguo Wei (2014)

Czechoslovak Mathematical Journal

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In this paper, we consider the classification of unital extensions of A F -algebras by their six-term exact sequences in K -theory. Using the classification theory of C * -algebras and the universal coefficient theorem for unital extensions, we give a complete characterization of isomorphisms between unital extensions of A F -algebras by stable Cuntz algebras. Moreover, we also prove a classification theorem for certain unital extensions of A F -algebras by stable purely infinite simple C * -algebras...