Solution of the Mumford-Shah conjecture

Francesco Deangelis

For a reduced planar absolute Mumford–Shah minimizer, each interior discontinuity point has a local C¹ arc, endpoint or 120-degree triple junction, with endpoints and junctions locally finite.

Sources for this record

What was already known

Earlier classification and regularity work left a noncompact disconnected crack with connected complement. The interior conjecture dates to 1989.

AI involvement AI-centered

Deangelis credits ChatGPT Astra with the initial strategy and draft after detailed human prompts and supplied background. He revised and simplified the proof.

The author specifically attributes the initial central proof strategy and manuscript to ChatGPT Astra, while documenting his own prior work, supplied context and later revisions.

Importance Major

Would close the remaining global-minimizer case and establish the planar interior regularity conjecture.

Limitations

The new step rules out bounded crack components using relaxed translations and a Hodge identity. Boundary regularity is outside the claim. The October 5 revision does not document a completed proof check.

Technical verification Reported

The first version explicitly says checking was ongoing, and the revised paper documents responsibility and revision without a completed rigorous check of the final theorem. Reported is the evidence default.

Human understanding Full

Deangelis's revised paper explains the compact translation, optimized second variations, Hodge equality and classification reduction; it documents human command of the central mechanism, independently of proof verification.

Correction and publication history

2026-10-18 · publication

Would close the remaining global-minimizer case and establish the planar interior regularity conjecture.

Read this published revision