1 problem

Let $m_1,m_2\in\mathbb N$, let $p\geq 3$, and let $V(m_1)$ and $V(m_2)$ denote the corresponding $SL_2$-modules. The extension space is $\operatorname{Ext}^n_{SL_2}(V(m_2),V(m_1))$…