Paulin's geometric level raising conjecture for the eigencurve

Fix distinct primes pp and ll, and an integer NN coprime to plpl. Let E\mathcal{E} be the cuspidal eigencurve of tame level Γ0(Nl)\Gamma_0(Nl), parametrising overconvergent cuspidal pp-adic modular eigenforms. For a point ϕ\phi of E\mathcal{E} corresponding to an eigenform fϕf_\phi, let πfϕ,l\pi_{f_\phi,l} be the associated representation of GL2(Ql)\mathrm{GL}_2(\mathbb{Q}_l). An irreducible connected component Z\mathcal{Z} of E\mathcal{E} is generically unramified principal series if the representations associated to its points away from a discrete set are unramified principal series, and generically special if they are special away from a discrete set. Let α\alpha and β\beta be the roots of

X2tlX+lsl,X^2-t_lX+ls_l,

where tlt_l and sls_l are the TlT_l and SlS_l eigenvalues of fϕf_\phi. Paulin's geometric level raising conjecture. If Z\mathcal{Z} is generically unramified principal series and there is a point ϕ\phi on Z\mathcal{Z} where the ratio of α\alpha and β\beta is l±1l^{\pm 1} and πfϕ,l\pi_{f_\phi,l} is special, then there exists a generically special component Z\mathcal{Z'} intersecting Z\mathcal{Z} at ϕ\phi. This predicts that a special representation at a level-raising point lies on a component whose generic local representation is special, extending geometric level raising phenomena on the eigencurve beyond the cases established by the paper's theorem.

Sources & referencesView supporting material

Primary source

James Newton, “Geometric level raising for p-adic automorphic forms”, arXiv:0903.3541 (2011).

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