Conjecture on the Bogomolov property for Galois representations attached to modular forms

Let k2k\geq 2, let fSk(Γ0(N))f\in S_k(\Gamma_0(N)) be a normalized eigenform, let Kf{\mathbb{K}}_f be the number field generated by its Hecke eigenvalues, and let Of\mathcal{O}_f be its ring of integers. For each finite place vv of Kf{\mathbb{K}}_f, let

ρf,v:GQGL2(Of,v)\rho_{f,v}:G_{\mathbb{Q}}\longrightarrow \mathrm{GL}_2(\mathcal{O}_{f,v})

be the associated Galois representation, and let

ρf=vρf,v:GQGL2(O^f).\rho_f=\prod_v\rho_{f,v}:G_{\mathbb{Q}}\longrightarrow \mathrm{GL}_2(\widehat{\mathcal{O}}_f).

A representation has property (B) when the field cut out by it has the Bogomolov property. The modular-form representation conjecture. For every normalized eigenform fSk(Γ0(N))f\in S_k(\Gamma_0(N)), for every vv, ρf,v\rho_{f,v} has property (B), and ρf\rho_f has property (B). The conjecture is presented as a generalization of Habegger's theorem; the source gives special cases, including CM modular forms, but does not state a general resolution.

Sources & referencesView supporting material

Primary source

Francesco Amoroso and Lea Terracini, “Bogomolov property and Galois representations”, arXiv:2403.03319 (2025).

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