Displaying similar documents to “Computational details-appendix to the article “Cartan matrices of selfinjective algebras of tubular type””

On the tameness of trivial extension algebras

Ibrahim Assem, José de la Peña (1996)

Fundamenta Mathematicae

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For a finite dimensional algebra A over an algebraically closed field, let T(A) denote the trivial extension of A by its minimal injective cogenerator bimodule. We prove that, if T A is a tilting module and B = E n d T A , then T(A) is tame if and only if T(B) is tame.

Cohomology of some graded differential algebras

Wojciech Andrzejewski, Aleksiej Tralle (1994)

Fundamenta Mathematicae

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We study cohomology algebras of graded differential algebras which are models for Hochschild homology of some classes of topological spaces (e.g. homogeneous spaces of compact Lie groups). Explicit formulae are obtained. Some applications to cyclic homology are given.