Cohomology Algebras with Two Generators.

Jaume Aguadé

Displaying similar documents to “Cohomology Algebras with Two Generators.”

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Distinguishing derived equivalence classes using the second Hochschild cohomology group

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We study the second Hochschild cohomology group of the preprojective algebra of type D₄ over an algebraically closed field K of characteristic 2. We also calculate the second Hochschild cohomology group of a non-standard algebra which arises as a socle deformation of this preprojective algebra and so show that the two algebras are not derived equivalent. This answers a question raised by Holm and Skowroński.

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Hochschild cohomology of generalized multicoil algebras

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We determine the Hochschild cohomology of all finite-dimensional generalized multicoil algebras over an algebraically closed field, which are the algebras for which the Auslander-Reiten quiver admits a separating family of almost cyclic coherent components. In particular, the analytically rigid generalized multicoil algebras are described.