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On stable equivalences induced by exact functors
Authors:Yuming Liu
Institution:School of Mathematical Sciences, Beijing Normal University, 100875 Beijing, People's Republic of China
Abstract:Let $ A$ and $ B$ be two Artin algebras with no semisimple summands. Suppose that there is a stable equivalence $ \alpha$ between $ A$ and $ B$ such that $ \alpha$ is induced by exact functors. We present a nice correspondence between indecomposable modules over $ A$ and $ B$. As a consequence, we have the following: (1) If $ A$ is a self-injective algebra, then so is $ B$; (2) If $ A$ and $ B$ are finite dimensional algebras over an algebraically closed field $ k$, and if $ A$ is of finite representation type such that the Auslander-Reiten quiver of $ A$ has no oriented cycles, then $ A$ and $ B$ are Morita equivalent.

Keywords:Stable equivalence induced by exact functors  simple module  indecomposable module
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