A little bit of extra functoriality for Ext and the computation of the Gerstenhaber bracket
classification
🧮 math.KT
keywords
resolutionalgebrabracketgerstenhabera-bimoduleactionarbitraryassociative
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We show that the action of the Lie algebra HH^1(A) of outer derivations of an associative algebra A on the Hochschild cohomology HH^*(A) of A given by the Gerstenhaber bracket can be computed in terms of an arbitrary projective resolution of A as an A-bimodule, without having recourse to comparison maps between the resolution and the bar resolution.
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