Tuesday, June 11, 14:40, 7.527
Exact Borel subalgebras and boxes.
By construction the Verma modules in BGG category O for a semisimple complex Lie algebra are induced
from the universal enveloping algebra of a Borel subalgebra. The analogue of this for quasi-hereditary
algebras leads to the notion of an exact Borel subalgebra.
In this (second) talk we explain how to construct such a subalgebra for every quasi-hereditary algebra
up to Morita equivalence by translating the A-infinity structure from the previous talk to the world of
This is joint work with Steffen Koenig and Sergiy Ovsienko based on arXiv: 1305.2315.