OpenAI reports the Artin K(π,1) conjecture in finite rank

The standard Salvetti complex of every Artin group with finitely many standard generators is aspherical, equivalently its universal cover is contractible.

Sources for this record

What was already known

The Artin K(π,1) conjecture was established for important classes of Artin groups, but the general finite-rank case remained open.

AI involvement AI-led

OpenAI credits itself as manuscript author and states that its internal frontier model produced the results in this release. Individual human input is not detailed enough to establish task-only autonomy.

OpenAI is named as author on the manuscript, and its release attributes the results to an internal frontier model. The individual human input is not detailed enough to establish autonomy.

Importance Major

Resolves the finite-rank Artin K(π,1) conjecture for every Coxeter matrix on a finite generating set.

Limitations

Infinite Coxeter edge labels, empty and disconnected diagrams are included. Later corollaries in the manuscript are outside the selected Lean statement.

Technical verification Formal (Lean 4)

OpenAI reports a Lean proof matching the selected claim.

Formal checking

The pinned Lean note proves contractibility of the universal cover of every finite-rank Artin Salvetti complex.

Checker
OpenAI-reported Lean 4 / Comparator
Scope
The standard Salvetti complex of every Artin group with finitely many standard generators is aspherical, equivalently its universal cover is contractible.
Basis
Reported by the linked checker
Evidence source

Checking a formal statement does not establish that it matches the original problem.

Human understanding Few

Few is the default when evidence for a higher level is insufficient. No named person is documented as explaining the central argument for this assessed contribution.

Correction and publication history

2026-10-18 · publication

Primary manuscript, attribution, prior-work, and scoped checking review for non-notifying local inclusion.

Read this published revision