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The Gerstenhaber bracket as a Schouten bracket for polynomial rings extended by finite groups (1511.02533v2)
Published 8 Nov 2015 in math.QA, math.KT, and math.RT
Abstract: We apply new techniques to Gerstenhaber brackets on the Hochschild cohomology of a skew group algebra formed from a polynomial ring and a finite group (in characteristic 0). We show that the Gerstenhaber brackets can always be expressed in terms of Schouten brackets. We obtain as consequences some conditions under which brackets are always 0, strengthening known results.