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Batalin-Vilkovisky structure over the Hochschild cohomology ring of a group algebra
We realize explicitly the well-known additive decomposition of the Hochschild
cohomology ring of a group algebra in the elements level. As a result, we
describe the cup product, the Batalin-Vilkovisky operator and the Lie bracket
in the Hochschild cohomology ring of a group algebra.Comment: This paper uses a Maple program which is avaible at
http://math.bnu.edu.cn/~liuym
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