Bogomolov conjecture for powers of the multiplicative group

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Let V⊂GmNV\subset {\mathbb G}_m^N be an irreducible subvariety defined over Q‾\overline{\mathbb Q}. For each ϵ≥0\epsilon\geq 0, set

Sϵ:={P∈(Q‾∗)N:h(P)≤ϵ}.S_{\epsilon}:=\left\{P\in\left(\overline{\mathbb Q}^{*}\right)^N: h(P)\leq\epsilon\right\}.

Bogomolov conjecture. If, for each ϵ>0\epsilon>0, the set V(Q‾)∩SϵV(\overline{\mathbb Q})\cap S_{\epsilon} is Zariski dense in VV, then VV is a torsion translate of an algebraic subgroup of GmN{\mathbb G}_m^N.

This strengthens the torsion-point case of Laurent's theorem by replacing height zero with arbitrarily small height. The conjecture for every power of the multiplicative group was proved by Zhang.

References

Primary source

Dragos Ghioca, “A Bogomolov type statement for function fields”, arXiv:1307.3748 (2013).

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