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Keywords:
piecewise hereditary algebra; Galois extension; directing object
piecewise hereditary algebra; Galois extension; directing object
Summary:
Let $A$ be a finite-dimensional $k$-algebra and $K/k$ be a finite separable field extension. We prove that $A$ is derived equivalent to a hereditary algebra if and only if so is $A\otimes _kK$.
References:
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