Main stability conjecture for zeta functions of algebraic-geometric Zp\mathbb{Z}_p-towers

Let (Cn)n0(C_n)_{n\geq 0} be a Zp\mathbb{Z}_p-tower of curves from algebraic geometry. Let gng_n be the genus of CnC_n, let dα(n)d_\alpha(n) be the slope-counting quantity defined in the paper, and write the reciprocal roots of P(Cn,s)P(C_n,s) as αi(n)\alpha_i(n), with vq(q)=1v_q(q)=1. Main stability conjecture. The following hold:

  1. There are constants a,b,ca,b,c with a>0a>0 such that gn=ap2n+bpn+cg_n=ap^{2n}+bp^n+c for all sufficiently large nn.
  2. For every fixed α[0,)\alpha\in[0,\infty), there are constants μ1(α),μ2(α)\mu_1(\alpha),\mu_2(\alpha) such that dα(n)=pnμ1(α)+μ2(α)d_\alpha(n)=p^n\mu_1(\alpha)+\mu_2(\alpha) for all sufficiently large nn.
  3. The multiset of qq-slopes {vq(αi(n))}\{v_q(\alpha_i(n))\} is equidistributed in [0,1][0,1] as nn\to\infty.
  4. There is a positive integer n0n_0, depending on the tower, such that for all n>n0n>n_0, the rescaled slopes {pnvq(αi(n))}\{p^nv_q(\alpha_i(n))\} are explicitly determined by their values for 0nn00\leq n\leq n_0 using finitely many arithmetic progressions.

This is the paper’s main geometric stability prediction and combines genus growth, fixed-slope asymptotics, global slope distribution, and finite slope-pattern behavior; the supplied text gives no resolution status.

Sources & referencesView supporting material

Primary source

Daqing Wan, “Zeta functions of Z_p-towers of curves”, arXiv:1912.01571 (2019).

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