Buzzard's slope conjecture for modular forms

Let p>3p>3 and NN be as above, and suppose that pp is Γ0(N)\Gamma_0(N)-regular, meaning that the conditions on the eigenvalues of TpT_p in weights up to kpk_p hold as specified above. Let s2,s4,s_2,s_4,\ldots be the integer sequences produced by Buzzard's algorithm, and let v2,v4,v_2,v_4,\ldots denote the sequences of pp-adic valuations of the eigenvalues of TpT_p acting on Sk(Γ0(N))S_k(\Gamma_0(N)). Buzzard's slope conjecture. Assume that pp is Γ0(N)\Gamma_0(N)-regular. Then the sequences s2,s4,s_2,s_4,\ldots of integers are precisely the sequences v2,v4,v_2,v_4,\ldots of pp-adic valuations of TpT_p acting on Sk(Γ0(N))S_k(\Gamma_0(N)). This conjecture predicts that Buzzard's combinatorial algorithm exactly determines the pp-adic slopes of modular forms of fixed level and varying even weight; the source gives no resolution status for this statement.

Sources & referencesView supporting material

Primary source

Eunsu Hur, “Slopes of modular forms and the Ghost conjecture”, arXiv:2508.02761 (2025).

Additional references

2 papers in this index state this conjecture (2003–2025). The statement above is taken from the most recent of them; the others are arXiv:math/0311364.

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