4 problems

Let $\CN$ be the nilpotent cone, let $^+subsetCN$ be its standard positive nilpotent subalgebra, and consider the $g$-module $Exts{{frak u}ell}(underC,underC)$ together with the…

Let $\g$ be the relevant Lie algebra, let $\CN$ be its nilpotent cone, and let $^+subsetCNsubsetg$ be the standard positive nilpotent subalgebra. Write…

Let $G$ be the simply connected Lie group with Lie algebra $\frak g$, let $\mathbb B=G/B$ be its flag variety, and let $\widetilde{\mathcal N}=T^*(G/B)$ with projection…

Let $\fM$ be the moduli space of $\bG$-torsors on $\BP^1$ with formal trivialization at infinity, stratified by $\fM_\eta$ for $\eta\in Y^+$. Write … where $K^\bullet_\eta$ is the…