The general Hadamard convergence conjecture for smooth sections

Let X/FqX/\mathbb{F}_q be a smooth projective variety equipped with an ample line bundle L\mathcal{L}, and let UdΓ(X,Ld)U_d \subset \Gamma(X,\mathcal{L}^d) be the open subvariety of smooth sections. The Hadamard convergence conjecture states that, in the Hadamard topology on H1\mathcal{H}_1,

limdZUd(qdimUdt)=(ZXKap([q(dimX+1)]))1\lim_{d\rightarrow \infty} Z_{U_d}\left(q^{-\dim U_d}t\right)=\left(Z_X^{\mathrm{Kap}}\left([q^{-(\dim X+1)}]\right)\right)^{-1}

and

(ZXKap([q(dimX+1)]))1=(k=1ZSymkX(qk(dimX+1)t))1.\left(Z_X^{\mathrm{Kap}}\left([q^{-(\dim X+1)}]\right)\right)^{-1}=\left(\prod_{k=1}^{\infty}Z_{\operatorname{Sym}^k X}\left(q^{-k(\dim X+1)}t\right)\right)^{-1}.

This conjecture strengthens the preceding convergence results, which hold separately in the Witt and weight topologies, by predicting convergence in their common Hadamard refinement. Its general validity remains open.

Sources & referencesView supporting material

Primary source

Margaret Bilu and Sean Howe, “Motivic Euler products in motivic statistics”, arXiv:1910.05207 (2019).

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