Slope stability conjecture for ordinary algebraic-geometric \p-adic towers

Let K/KK_{\infty}/K be an algebraic-geometric ordinary pp-adic Lie tower with no proper constant subextension. Write

P(Kn,s)=i=12gn(1αi(n)s),P(K_n,s)=\prod_{i=1}^{2g_n}(1-\alpha_i(n)s),

and normalize vqv_q by vq(q)=1v_q(q)=1. The qq-slopes are the rational numbers vq(αi(n))v_q(\alpha_i(n)), and rp(n,α)r_p(n,\alpha) denotes the multiplicity of a fixed rational slope α[0,1]\alpha\in[0,1].

Slope stability conjecture. The following hold: (1) the qq-slopes are equidistributed in [0,1][0,1] as nn\to\infty; (2) for each fixed rational α[0,1]\alpha\in[0,1], there is a polynomial Rα(x)Q[x]R_\alpha(x)\in\mathbb{Q}[x] of degree at most dim(G){\rm \dim}(G), depending on the tower, such that for all sufficiently large nn,

rp(n,α)=Rα(pn);r_p(n,\alpha)=R_\alpha(p^n);

(3) there is a positive integer n0n_0, depending on the tower, such that for all n>n0n>n_0, the rescaled slopes

{pnvq(α1(n)),,pnvq(α2gn(n))}\{p^nv_q(\alpha_1(n)),\ldots,p^nv_q(\alpha_{2g_n}(n))\}

are determined explicitly by their values for 0nn00\leq n\leq n_0 using finitely many arithmetic progressions.

This conjecture refines pp-rank and genus stability into predictions for the full slope data of zeta functions. The source presents the three parts as conjectural and gives no resolution status.

Sources & referencesView supporting material

Primary source

Daqing Wan, “Class numbers and p-ranks in Z_p^d-towers”, arXiv:1712.02906 (2018).

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