Relative Lehmer conjecture for heights relative to divisible subgroups

Let g1,,gnQ×g_1,\dots,g_n\in\overline{\mathbb{Q}}^\times and let Γ=g1,,gndiv\Gamma=\langle g_1,\dots,g_n\rangle^{\mathrm{div}} be a finite-rank divisible subgroup of Gm(Q)\mathbb{G}_m(\overline{\mathbb{Q}}). Define

hΓ(α)=infγΓh(α/γ),h_\Gamma(\alpha)=\inf_{\gamma\in\Gamma}h(\alpha/\gamma),

and let k=Q(g1,,gn)k=\mathbb{Q}(g_1,\dots,g_n). Relative Lehmer conjecture. For every ε>0\varepsilon>0, there exists CΓ(ε)>0C_\Gamma(\varepsilon)>0 such that, for every αGm(Q)Γ\alpha\in\mathbb{G}_m(\overline{\mathbb{Q}})\setminus\Gamma,

hΓ(α)CΓ(ε)[kcyc(α):kcyc]2+ε.h_\Gamma(\alpha)\geq\frac{C_\Gamma(\varepsilon)}{[k^{\mathrm{cyc}}(\alpha):k^{\mathrm{cyc}}]^{2+\varepsilon}}.

This is presented as a weaker version of the weak form of Rémond's generalized Lehmer conjecture, and its resolution is not established by the supplied text.

Sources & referencesView supporting material

Primary source

Robert Grizzard, “Remarks on Rémond's generalized Lehmer problems”, arXiv:1710.11614 (2017).

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