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JOURNALS // Zapiski Nauchnykh Seminarov POMI // Archive

Zap. Nauchn. Sem. POMI, 2016 Volume 452, Pages 70–85 (Mi znsl6357)

This article is cited in 6 papers

On derived equivalence of algebras of semidihedral groups with two simple modules

A. I. Generalov, A. A. Zaikovskii

St. Petersburg State University, St. Petersburg, Russia

Abstract: We compute the Hochschild cohomology groups of degrees not exceeding 3 for algebras of semidihedral type which form the family $SD(2\mathcal B)_1$ (from the famous K. Erdmann's classification). In the calculation, we use the beforehand construction of the initial part of the minimal projective bimodule resolution for algebras from the family under discussion. The obtained results imply that algebras from the families $SD(2\mathcal B)_1$ and $SD(2\mathcal B)_2$ with the same parameters in defining relations are not derived equivalent.

Key words and phrases: Hochschild cohomology groups, algebras of semidihedral type, bimodule resolution.

UDC: 512.5

Received: 27.10.2016


 English version:
Journal of Mathematical Sciences (New York), 2018, 232:5, 635–646

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© Steklov Math. Inst. of RAS, 2024