From quasi-hereditary algebras with exact Borel subalgebras to directed bocses
Published in Bulletin of the London Mathematical Society, 2020
Recommended citation: Tomasz Brzeziński, Steffen Koenig, and Julian Külshammer (2020). "From quasi-hereditary algebras with exact Borel subalgebras to directed bocses." Bulletin of the London Mathematical Society. 52(2). https://doi.org/10.1112/blms.12331
Up to Morita equivalence, every quasi-hereditary algebra is the dual algebra of a directed bocs or a coring. From the bocs, an exact Borel subalgebra is obtained. In this paper a characterisation of exact Borel subalgebras arising in this way is given.