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math.AG2025
Automorphisms of Frobenius twisted de Rham cohomology
Shizhang Li, Shubhodip Mondal
In this short paper, we prove that the moduli of automorphisms of Frobenius twisted de Rham cohomology functor is given by . Our method is to use the notion of $\math…
math.AG2025
Bounding crystalline torsion from étale torsion
Ofer Gabber, Shizhang Li
In this note, we prove that given a smooth proper family over a -adic ring of integers, one gets a control of its crystalline torsion in terms of its étale torsion, the cohomolo…