Subalgebras of the Gerstenhaber algebra of differential operators
  We construct a family of subalgebras of the Gerstenhaber algebra of differential operators. The subalgebras are labeled by subsets of the additive group ${\mathbb Z}^n$ that are closed under addition. Each subalgebra is invariant under the Hochschild coboundary operator. 
A.V.Bratchikov
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