arXiv subjects

Jan Weidner

Publications and source records attributed to Jan Weidner.

2 recordsLinked to original sources

arXiv2014

Grassmannians and Koszul duality

Let $X$ be a partial flag variety, stratified by orbits of the Borel. We give a criterion for the category of modular perverse sheaves to be equivalent to modules over a Koszul ring. This implies that modular category $\mathcal O$ is governed by a Koszul-algebra in small examples.

math.RT↗

arXiv2013

Modular equivariant formality

Let $X$ be a partial flag variety, equipped with the Borel action by multiplication. We give a criterion for the equivariant derived category with modular coefficients to be formal.

math.RT↗