3 papers
math.RT2025
Exact Borel subalgebras, idempotent quotients and idempotent subalgebras
Teresa Conde, Julian Külshammer
This article studies the compatibility of Koenig's notion of an exact Borel subalgebra of a quasi-hereditary or, more generally, standardly stratified algebra with taking idempoten…
math.RT2023
Towards bound quivers for exact categories
Julian Külshammer
In this survey article we propose the notion of a bound quiver for an exact category generalising the classical concept of the Gabriel quiver and its relation for a module category…
math.RT2016
The naive approach for constructing the derived category of a -abelian category fails
Gustavo Jasso, Julian Külshammer
Let be a field. In this short note we give an example of a -abelian -category, realized as a -cluster-tilting subcategory of the category of fi…