منابع مشابه
Cohomology of Twisted Tensor Products
It is well known that the cohomology of a tensor product is essentially the tensor product of the cohomologies. We look at twisted tensor products, and investigate to which extent this is still true. We give an explicit description of the Ext-algebra of the tensor product of two modules, and under certain additional conditions, describe an essential part of the Hochschild cohomology ring of a t...
متن کاملConnections over Twisted Tensor Products of Algebras
Motivated from some results in classical differential geometry, we give a constructive procedure for building up a connection over a (twisted) tensor product of two algebras, starting from connections defined on the factors. The curvature for the product connection is explicitly calculated, and shown to be independent of the choice of the twisting map and the module twisting map used to define ...
متن کاملOn Iterated Twisted Tensor Products of Algebras
We introduce and study the definition, main properties and applications of iterated twisted tensor products of algebras, motivated by the problem of defining a suitable representative for the product of spaces in noncommutative geometry. We find conditions for constructing an iterated product of three factors, and prove that they are enough for building an iterated product of any number of fact...
متن کاملNon-simply-connected Twisted Tensor Products
This paper develops a formula for the equivariant chain-complex of the universal covering space of a Serre bration's total space in terms of equivariant chain-complexes of the base and ber. The present paper's distinguishing feature is that both the base and ber are allowed to be non-simply-connected: the fundamental group of the total space is thus an extension of that of the base by that of t...
متن کاملGerstenhaber Brackets on Hochschild Cohomology of Twisted Tensor Products
We construct the Gerstenhaber bracket on Hochschild cohomology of a twisted tensor product of algebras, and, as examples, compute Gerstenhaber brackets for some quantum complete intersections arising in work of Buchweitz, Green, Madsen, and Solberg. We prove that a subalgebra of the Hochschild cohomology ring of a twisted tensor product, on which the twisting is trivial, is isomorphic, as a Ger...
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ژورنال
عنوان ژورنال: Algebras and Representation Theory
سال: 2018
ISSN: 1386-923X,1572-9079
DOI: 10.1007/s10468-018-9833-1