Open Research Index

rwst/Confinement-Certificates

Ralf Stephan (direction, review, paper author)

Palomar Registrypalomar/PALOMAR-2026-08-24-000002Sep 6, 2026math.NTscore 0

A Lean 4 / Mathlib development of a paper on the emptiness theory of the sets Z_{p/q}(s, s+t) = {ξ > 0 : {ξ(p/q)ⁿ} ∈ [s, s+t) for all n ≥ 0}, the generalized Z-numbers of Flatto, Lagarias and Pollington, at and beyond the window length 1/p. The paper introduces block certificates --- finite integer witnesses, rechecked from scratch by the Lean proof kernel, whose soundness rests on the aperiodicity lemma alone --- and uses them to pass the length-$1/p$ line: $\Zset_{3/2}(1/6,13/24)=\emptyset$ (window length $3/8>1/3$), $\Zset_{3/2}(961/3600,2427/3600)=\emptyset$ (length $733/1800$), and…

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