arXiv subjects
Publications and source records attributed to Noam Nissan.
This paper extends the affine Springer theory developed by Bouthier, Kazhdan, and the second author (see [BKV]) to the mixed characteristic case. In particular, we introduce a theory of perfectly placid perfect infinity stacks and establish their dimension theory. Furthermore, we prove that, in the Witt vector setting, the Chevalley morphism between arc spaces is flat.
We compute the delta power operation for morava E-theory of height 2 at the prime 3. The delta power operation was defined using the notion of higher semi additivity by Shachar Carmeli, Tomer M. Schlank and Lior Yanovski. We briefly survey the basic definitions in higher semi-additivity. Using explicit formulas for moduli spaces of elliptic curves and computations done by Y. Zhu for the total power operation we provide an explicit formula for the delta power operation. We obtain the numerical result that the delta operation of a polynomial is a polynomial which can be explained by a certain connection which was described by M. Hopkins, C. Rezk and later N. Stapleton between similar operations and the Hecke action on the functions on the moduli space of elliptic curves.