Developments from Barr's thesis

[摘要] In 1962, Barr exhibited an idempotent in the rational group algebra of the symmetric group which split the Hochschild cochain complex of a commutative algebra into the direct sum of the Harrison complex and a complement. This discovery has led to significant developments both in the cohomology of commutative algebras and in understanding the relations between Hochschild cohomology and simplicial and sheaf cohomology. (C) 1999 Elsevier Science B.V. All rights reserved. MSG: 16E40; 20C30.

[发布日期] 1999-11-10

[效力级别]  Proceedings Paper