 A cyclic non-Ramsey heptagon by Dömötör Pálvölgyi

Primary preprint arXiv:2609.23327v1: arxiv.org/abs/2609.23327v1

Theorem1 reports a seven-point non-Ramsey configuration on a circle for every transcendental parameter r>2. The source is a preprint; its first-page disclosure and author note distinguish the main result from further appendix claims. The spherical-point-set entry attributes the reported counterexample to this dated preprint rather than asserting an undated open status.