Home Problems Poincaré conjecture Research history Selected research history · publication v9
Poincaré conjecture Follow the ideas, results and limitations over time. This is a selected history, not a complete literature survey or a measure of how close the problem is to being solved.
Current state & remaining question → Viewing the timeline from pinned publication v9.
6 selected milestones · Source coverage checked 2026-10-12 · Historical annotation and mathematical review remain separate.
1904 publication
Foundation
Poincaré poses the question The loop-contraction question becomes the three-dimensional conjecture.
Statements & sources Historical annotation review: pending. The date refers to the publication, with the precision supported by the source.
Jul 17, 2003 preprint
Related result
Perelman’s finite-extinction argument The final preprint supplies extinction for the relevant Ricci flows with surgery.
Statements & sources Historical annotation review: pending. The date refers to the preprint, with the precision supported by the source.
2007 publication
Related result
A detailed proof account Morgan and Tian publish the proof and three-sphere conclusion.
Statements & sources Historical annotation review: pending. The date refers to the publication, with the precision supported by the source.
Sep 27, 2026 preprint
Formalization
A source-pinned Lean formalization report The authors report smooth and topological proofs with release-specific endpoint audits.
Statements & sources Historical annotation review: pending. The date refers to the preprint, with the precision supported by the source.
Sep 28, 2026 formalization
Formalization
External comparator verification is reported FrenzyMath records statement and kernel checks at its named proof commit.
Statements & sources Historical annotation review: pending. The date refers to the formalization, with the precision supported by the source.
Oct 6, 2026 preprint
Formalization
An AI-assisted formalization account The preprint describes the project and public evidence.
Statements & sources Historical annotation review: pending. The date refers to the preprint, with the precision supported by the source.
Scope & review: Historical mathematics, external formal reports and OpenMath verification are separate evidence.
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