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Journal ArticleDOI

On the homology of graded algebras

Martin Lorenz
- 01 Jan 1992 - 
- Vol. 20, Iss: 2, pp 489-507
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TLDR
In this paper, the components of Hochschild homology in the case of strongly G graded algebra are described in terms of a spectral sequence where Hq (R,Sg ) is the Hochhedral homology of the identity component R = Se of S with coefficients in the bimodule Sg.
Abstract
Let be an algebra that is graded by a group G. Then the Hochschild and cyclic homologies of S have canonical decompositions with components labeled by the set T(G) of conjugacy classes of G : for Hochschild homology and similarly for cyclic homology. In this article, we describe the components of Hochschild homology in the case where S is strongly G graded.The description is given in terms of a spectral sequence where Hq (R,Sg ) is the Hochschild homology of the identity component R = Se of S with coefficients in the bimodule Sg and Hp (CG (g),.) is the group homology of the centralizer CG (g) of g in G. If R is a separable algebra then the spectral sequence degenerates and yields an isomorphism

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Hochschild cohomology on Hopf Galois extensions

TL;DR: For a Hopf Galois extension, A B, the authors constructed spectral sequences connecting the Hochschild cohomologies and homologies of A and B for the Hopf-Galois extension.
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Chern characters and Hirzebruch-Riemann-Roch formula for matrix factorizations

TL;DR: In this article, the category of matrix factorizations for an isolated hypersurface singularity was studied and the canonical bilinear form on the Hochschild homology of this category was computed.
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Homologie des invariants d'une algèbre de Weyl sous l'action d'un groupe fini☆☆☆

TL;DR: In this article, the Hochschild homology and cohomology groups of the invariant algebra A n (C ) G were computed for a finite subgroup of Sp (2 n, C ) acting by automorphisms in the Weyl algebra.
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Chern characters and Hirzebruch-Riemann-Roch formula for matrix factorizations

TL;DR: In this paper, the category of matrix factorizations for an isolated hypersurface singularity was studied and the canonical bilinear form on the Hochschild homology of this category was computed.
References
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Book

Cohomology of Groups

TL;DR: In this paper, an advanced textbook introduces students to cohomology theory and no knowledge of homological algebra is assumed beyond what is normally taught in a first course in algebraic topology.
Book

A Course in Homological Algebra

TL;DR: In this paper, the authors propose an extension of the Kunneth Theorem for Abelian groups, which is based on the notion of double complexes, and they use it to define the (co-)homology of groups.