Modulare Koszul-Dualit"at
arXiv:1109.0563
Abstract
We prove an analogon of Koszul duality for category O in positive characteristic. However, there are no Koszul rings, and we do not prove an analog of the Kazhdan-Lusztig conjectures in this context.
Some proofs in this article are incorrect. The article was merged into joint work with S.Riche and G.Williamson, arxiv 1209.3760