A Smooth Counterexample to the Trautman Conjecture

Sean N. Curry

Curry constructs a nonnegative smooth, arbitrarily C²-small perturbation of a strongly pseudoconvex CR 3-structure with a nowhere-zero closed canonical-bundle section, but every local C¹ CR function has zero differential at the origin. It is therefore not locally embeddable.

Sources for this record

What was already known

Earlier smooth nonembeddable CR 3-manifolds lacked a closed canonical section; analogous examples with that section existed in dimension seven.

AI involvement AI-centered

Sean Curry reports discovering the counterexample while experimenting with ChatGPT Plus. He selected the problem, revised the manuscript, independently checked all arguments and explains the obstruction.

The original paper ties the central counterexample construction to experimentation with ChatGPT, with substantial human direction and proof development; the exact model-generated step is unavailable.

Importance Notable

Gives a counterexample to the proposed smooth three-dimensional implication.

Limitations

The paper also globalizes the example to a small perturbation on S³, without separately crediting that step to ChatGPT. The model conversation is unavailable, so its precise construction step is unknown.

Technical verification Formal (human)

Curry explicitly reports independently checking all calculations and arguments of the presented counterexample; under the site policy this is a completed, source-reported human proof check, though no external referee or machine check is documented.

Independent checking

independent human check of all manuscript calculations and arguments

Checker
Sean N. Curry, author
Scope
Theorem 1.1 smooth closed-section counterexample and its presented supporting arguments
Basis
Reported by the linked checker
Evidence source

Human understanding Full

Curry's explanation identifies the preserving Hamiltonian perturbation and the weighted-moment nonembeddability mechanism, and he substantially rewrote the proof.

Correction and publication history