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arXiv · 2607.19952

The Pila-Zannier strategy for Drinfeld modules and Drinfeld modular curves

Gal Binyamini·Dmitry Novikov·Francesco Maria Saettone
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Abstract

We extend the Pila-Zannier strategy to Drinfeld modules: we prove analogues of the Manin-Mumford theorem for a product of two Drinfeld modules of equal rank, and of the Andr\'e-Oort theorem for a product of two Drinfeld modular curves. In characteristic zero, several steps of this strategy rest on $o$-minimality, which has no counterpart over a function field; we replace the counting step by the rigid analytic Pila-Wilkie theorem of Binyamini-Kato, and this appears to be its first arithmetic application. The functional transcendence input, namely an analogue of the Ax-Lindemann theorem in both settings, is established here by an independent point counting argument.

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Gal Binyamini, Dmitry Novikov, Francesco Maria Saettone. 2026-07-22. The Pila-Zannier strategy for Drinfeld modules and Drinfeld modular curves. https://arxiv.org/abs/2607.19952

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