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arXiv 1104.2858math.AG
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关于$\bZ/p^n\bZ$上光滑簇上微分算子环的中心

On the center of the ring of differential operators on a smooth variety over $\bZ/p^n\bZ$

Allen Stewart, Vadim Vologodsky

摘要:

我们计算了$\bZ/p^n\bZ$上一个光滑簇上的PD微分算子环的中心,证实了Kaledin的一个猜想.更一般地,给定结合代数$A_0$ over $\bF_p$及其平坦变形$A_n$ over $\bZ/p^{n+1}\bZ$,我们证明了在一定的非退化条件下,$A_n$的中心同构于$A_0$的中心上的长$n+1$ Witt向量环.

英文摘要:

We compute the center of the ring of PD differential operators on a smooth variety over $\bZ/p^n\bZ$ confirming a conjecture of Kaledin. More generally, given an associative algebra $A_0$ over $\bF_p$ and its flat deformation $A_n$ over $\bZ/p^{n+1}\bZ$ we prove that under a certain non-degeneracy condition the center of $A_n$ is isomorphic to the ring of length $n+1$ Witt vectors over the center of $A_0$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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