Rigidity and Frobenius Structure
Algebraic Geometry
2016-12-15 v2
Abstract
We show that an irreducible ordinary differential equation on the projective line has a Frobenius structure for a power of some prime p if it is rigid in the sense of Katz and satisfies some other reasonable (and necessary) conditions relative to the prime p.
Keywords
Cite
@article{arxiv.1606.02246,
title = {Rigidity and Frobenius Structure},
author = {Richard M. Crew},
journal= {arXiv preprint arXiv:1606.02246},
year = {2016}
}
Comments
10 pages. The proofs of proposition 1, theorem 3 and some other brief passages have been rewritten for clarity. A few misprints were corrected