Σ\Sigma-refined Kim's conjecture for the thrice-punctured line

Let SS be a finite set of primes, let X=P1{0,1,}X=\mathbb P^1\smallsetminus\{0,1,\infty\}, and let pSp\notin S be a prime. A refinement condition is a tuple Σ=(Σ)S{0,1,}S\Sigma=(\Sigma_\ell)_{\ell\in S}\in\{0,1,\infty\}^S, and let X(ZS)ΣX(\mathbb Z_S)_\Sigma be the set of SS-integral points whose reduction modulo each S\ell\in S lies in (X{Σ})(F)(X\cup\{\Sigma_\ell\})(\mathbb F_\ell). Let X(Zp)S,nΣX(\mathbb Z_p)_{S,n}^{\Sigma} be the associated Σ\Sigma-refined Chabauty--Kim locus. Σ\Sigma-refined Kim's conjecture. One has

X(Zp)S,nΣ=X(ZS)ΣX(\mathbb Z_p)_{S,n}^{\Sigma}=X(\mathbb Z_S)_\Sigma

for n0n\gg0. The total refined locus is the union of these loci over all refinement conditions, so this conjecture refines the assertion that deep Chabauty--Kim loci contain no extra pp-adic points. Its general status is not resolved by the supplied text.

Sources & referencesView supporting material

Primary source

Martin Lüdtke, “Refined Chabauty–Kim computations for the thrice-punctured line over Z[1/6]”, arXiv:2402.03573 (2024).

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