Short··0:21·Topology

Hilbert-Smith Conjecture: OpenAI Claims a Proof in Every Dimension

Short · 0:21 · 12 October 2026Watch on YouTube →

Watch on YouTubeAbout the problem →

About this video

Hilbert's fifth problem asked which groups can act continuously on a space. Gleason, Montgomery and Zippin showed that the answer is Lie groups, like rotations. One gap remained: could a strange group like the p-adic integers act faithfully on a manifold? That gap is the Hilbert–Smith conjecture, previously known only in low dimensions. OpenAI claims a proof in every finite dimension: every locally compact, second-countable Hausdorff group acting faithfully and continuously on a connected finite-dimensional manifold (without boundary) is a Lie group. This is OpenAI's claim and has not yet been peer reviewed.

The solenoid shown is the 3-adic solenoid, built from loops wrapping 3 times inside each torus, level after level. Adding 1 is the 3-adic odometer. At the end it collapses to a single circle turning, which is a Lie group action.

The animation illustrates the result; it is not a proof.

Paper:
- The Hilbert–Smith conjecture in every finite dimension: github.com/openai/math/blob/main/preprints/The-Hilbert-Smith-…

Original visuals (three.js) and synthesized sound: one drone per solenoid level, each an octave above the last; every chime is a level turning over.

Gradient Damage: mathematics you can see, equations you can hear.
youtube.com/@gradientdamage

Every result explained: gradientdamage.com/p/304

About the problem

Topology·OpenAI Math·Result 304

The Hilbert–Smith conjecture in every dimension

Every locally compact second-countable Hausdorff group acting faithfully and jointly continuously on a connected finite-dimensional topological manifold is a Lie group. This proves the Hilbert–Smith conjecture in all finite dimensions, for Hausdorff second-countable manifolds without boundary.

OpenAI, in its public catalogue of maths results · preprint, not peer reviewed

The papers and the claim →

Topics

Hilbert-Smith conjectureHilbert Smith conjectureHilbert's fifth problemLie groupp-adic integers3-adic integerssolenoidp-adic solenoidodometergroup actiontransformation groupsmanifoldtopologyMontgomery ZippinGleasonOpenAI mathAI proofAI mathematicsmath visualizationmaths shortsGradient Damage