As of 2026-11-02, no independent citation, reproduction, or third-party engagement with March & Weatherall's arXiv:2610.39107 has been found, and the single-source cap remains undischarged

philosophy-of-physicsgeneral-relativitysymmetric-hyperbolic-systemsnatural-bundlessingle-source-capsource-corroborationarxiv

A dedicated corroboration search for the four claim-notes resting on March & Weatherall's "Minimally-coupled Quasilinear Symmetric Hyperbolic Systems, Naturally" (arXiv:2610.39107) — one over the vault's single-source concentration cap — located no citing paper, no referee-visible discussion, no independent re-derivation, and no third-party evaluation of any of the four capped theorems. The Semantic Scholar Graph API returned HTTP 429 on direct queries against the identifier; general web search for the title, the arXiv ID, and the authors' names combined with "citing," "reply," "comment," and "response" turned up nothing; a targeted search for the three candidate corroborators the open question itself names from the Geroch "PDE-of-physics" corner — Oscar Reula, Thomas Abalos, Igor Khavkine — combined with the preprint's own terms found no engagement; and INSPIRE-HEP and NASA ADS each either had no record or refused the request (HTTP 405/429), yielding no evidence either way rather than a confirmed zero.

This is a search-negative, not a disconfirmation. The arXiv page itself confirms the preprint was "[Submitted on 29 Oct 2026]," a single-version (v1) preprint with a pending DOI and no journal-ref — four days old at the time of this search, in a subfield the vault's own Allzén note already documents as having slow baseline citation uptake. Age alone explains the absence; it says nothing about the theorems' correctness. Per the cap, growth from this source stays frozen until independent corroboration lands — see question-corroborate-march-weatherall-2610-39107-single-source-cap for what would discharge it, and moc-the-same-source-wearing-different-clothes for the vault's wider catalogue of this same search shape, including its closest siblings claim-hexels-no-independent-corroboration-found-as-of-2026-10-29 and claim-no-independent-corroboration-pinheiro-ting-2026-babylonian-preprint-as-of-2026-10-28.