Generalized hypergeometric equations and $2$d TQFT for dormant opers in characteristic $\leq 7$

Fuente: arXiv
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Main Authors: Mori, Keita, Wakabayashi, Yasuhiro
Format: Preprint
Published: 2025
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author Mori, Keita
Wakabayashi, Yasuhiro
author_facet Mori, Keita
Wakabayashi, Yasuhiro
contents This note studies $\mathrm{PGL}_n$-opers arising from generalized hypergeometric differential equations in prime characteristic $p$. We prove that these opers are rigid within the class of dormant opers. By combining this rigidity result with previous work in the enumerative geometry of dormant opers, we obtain a complete and explicit description of the $2$d TQFTs that compute the number of dormant $\mathrm{PGL}_n$-opers for primes $p \leq 7$.
format Preprint
id arxiv_https___arxiv_org_abs_2509_03994
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Generalized hypergeometric equations and $2$d TQFT for dormant opers in characteristic $\leq 7$
Mori, Keita
Wakabayashi, Yasuhiro
Algebraic Geometry
This note studies $\mathrm{PGL}_n$-opers arising from generalized hypergeometric differential equations in prime characteristic $p$. We prove that these opers are rigid within the class of dormant opers. By combining this rigidity result with previous work in the enumerative geometry of dormant opers, we obtain a complete and explicit description of the $2$d TQFTs that compute the number of dormant $\mathrm{PGL}_n$-opers for primes $p \leq 7$.
title Generalized hypergeometric equations and $2$d TQFT for dormant opers in characteristic $\leq 7$
topic Algebraic Geometry
url https://arxiv.org/abs/2509.03994