Nilpotent commuting varieties of the Witt algebra

Yu-Feng Yao, Hao Chang

Let $\mathfrak{g}$ be the $p$-dimensional Witt algebra over an algebraically closed field $k$ of characteristic $p>3$. Let $\mathcal{N}=x\in ⋙\mid x^{[p]}=0$ be the nilpotent v…