简约模李代数的上同调

令\,$G$\,为素特征代数闭域上简约连通的代数群, $\mathfrak{g}$\,是\,$G$\,的李代数. 本文研究当\,$p$-特征\,$\chi$\,具有标准\,Levi\,型时简约模李代数\,$\mathfrak{g}$\,的上同调. 当\,baby Verma\,模的最高权为\,$p$-正则时, 得到了\,baby Verma\,模和扭\,baby Verma\,模之间的扩张群非分裂的充分必要条件.

Cohomology of reductive modular Lie algebras

Let $G$ be a connected reductive algebraic group over an algebraically closed field $k$ of prime characteristic $p$, and $\mathfrak{g}=\mathrm{Lie}(G)$. This paper studied the cohomology of the reductive Lie algebra $\mathfrak{g}$ with $p$-character $\chi$ of standard Levi form. When the highest weight of baby Verma module is $p$-regular, the necessary and sufficient condition for the Ext groups between baby Verma module and twist baby Verma module being non-split was gotten.