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Hochschild cohomology of piecewise hereditary algebras
Let Λ be a finite-dimensional algebra over an algebraically closed field k.The category of (finite length) Λ-modules is denoted by mod Λ.We denote by D b (Λ) the bounded derived category of complexes over modΛ.We say that Λ is piecewise hereditary of type H if there exists a hereditary abelian …