The unified Mordell–Lang conjecture for uniformizable T-modules

Let A=(Gam,Φ)\mathcal{A}=(\mathbb{G}_{a}^{m},\Phi) be a uniformizable TT-module such that there exists iN{0}i\in\mathbb{N}\setminus\{0\} for which the leading coefficient matrix of Φ(Ti)\Phi(T^{i}) is invertible. Let XX be an algebraic subvariety of Gam\mathbb{G}_{a}^{m}, let Γ\Gamma be a finitely generated subgroup of A(k)\mathcal{A}(\overline{k}), and let Γ\overline{\Gamma} be the object defined in Statement 1. A torsion subvariety is a translate of a sub-TT-module by a torsion point. Unified conjecture. There exist finitely many torsion subvarieties γ1+B1,,γs+Bs\overline{\gamma}_{1}+\mathcal{B}_{1},\ldots,\overline{\gamma}_{s}+\mathcal{B}_{s} of A\mathcal{A} such that

XΓ=1is(γi+BiΓ).X\cap\overline{\Gamma}=\bigcup_{1\leq i\leq s}(\overline{\gamma}_{i}+\mathcal{B}_{i}\cap\overline{\Gamma}).

The authors propose this as a modification of Denis' statement after explaining that their examples refute the earlier formulations. They note that it would imply Ghioca's conjecture for powers of Drinfeld modules; the source does not prove the unified assertion.

Sources & referencesView supporting material

Primary source

Luca Demangos, “Some examples toward a Manin-Mumford conjecture for T-modules”, arXiv:1501.05408 (2015).

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