Yichen Qin

works on

birational geometry 1 crepant birational equivalence 1 irregular hodge theory 1 landau-ginzburg models 1 twisted de rham cohomology 1

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math.NT2025

On Siegel's problem and Dwork's conjecture for $G$ -functions

Javier FresÃ¡n, Yeuk Hay Joshua Lam, Yichen Qin

We answer in the negative Siegel's problem for $G$ -functions, as formulated by Fischler and Rivoal. Roughly, we prove that there are $G$ -functions that cannot be written as polynom…

On Siegel's problem and Dwork's conjecture for G-functions

On Siegel's problem and Dwork's conjecture for $G$ -functions