Blowup for the Euler Equations with Smooth Forcing

Alpöge and Buckmaster construct smooth compactly supported initial velocity and forcing smooth through blowup time for 3D incompressible Euler on R³. A finite-energy classical solution develops unbounded vorticity in finite time, with divergent time-integrated vorticity sup norm and uniqueness in the stated preterminal class.

Sources for this record

What was already known

Córdoba and Martínez-Zoroa developed the forced-blowup program and had blowup with rougher forcing; Córdoba, Martínez-Zoroa and Zheng had an unforced solution with lower regularity at a point. Smooth-forcing Euler blowup within this construction was the new step, distinct from the later OpenAI unforced Euler claim.

AI involvement AI-led

Buckmaster credits Córdoba and Martínez-Zoroa with the earlier program. An LLM generated the new proof under Alpöge and Buckmaster’s direction; Claude wrote the Lean code under Alpöge’s direction.

The new proof was LLM-generated within a human-directed program; its historical starting idea belongs to Córdoba and Martínez-Zoroa.

Importance Notable

Achieves finite-time Euler blowup with forcing smooth through the blowup time.

Limitations

The result uses external forcing and does not settle unforced Euler blowup. The reported Lean theorem covers the forced blowup and uniqueness claim, but not every geometric detail in the later manuscript. No complete human proof review is documented.

Technical verification Formal (Lean 4 with Mathlib, Comparator and exact interval-arithmetic certificates)

The source reports a complete Lean 4 proof of the matched forced-Euler blowup proposition, including vorticity divergence and the stated uniqueness class. Alpöge checked statement alignment, but no completed human proof check is documented. The more specific torus support and initial-swirl details of the later manuscript are outside the cited Lean proposition.

Formal checking

The source reports a complete Lean 4 proof of the matched forced-Euler blowup proposition, including vorticity divergence and the stated uniqueness class. Alpöge checked statement alignment, but no completed human proof check is documented. The more specific torus support and initial-swirl details of the later manuscript are outside the cited Lean proposition.

Checker
Lean 4 kernel and Comparator, as reported by Alpöge and Buckmaster's release
Scope
Existence of smooth-forced finite-time Euler vorticity blowup on R3 with finite energy, divergent vorticity integral and preterminal uniqueness
Basis
Reported by the linked checker
Evidence source

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

Human understanding Partial

The authors explain the inherited layered-vortex program and the manuscript's construction, but Buckmaster expressly described the new model proof as still being understood and rewritten. The later manuscript does not establish that this gap was fully closed.

Correction and publication history

2026-10-18 · publication

An LLM generated the new proof under human direction; the matched core theorem was checked in Lean.

Read this published revision