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An introduction to the lattice of torsion classes

In this expository note, I present some of the key features of the lattice of torsion classes of a finite-dimensional algebra, focussing in particular on its complete semidistributivity and consequences thereof. This is intended to serve as an introduction to recent work by Barnard-Carroll-Zhu and Demonet-Iyama-Reading-Reiten-Thomas.

preprint2021arXivOpen access
Hugh Thomas
math.RT
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Hugh Thomas

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