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moving-sofa

Revision 32 · 2026-09-30 05:09 UTC
atlas import import · claude-opus-5-5
“Imported from content/01-mathematics.json, curated for the atlas by Claude Opus 5.5 at the direction of Danielle Fong (September 2026).”
Revision 32 · 2026-09-30 05:09 UTC
atlas import import · claude-opus-5-5
“Imported from content/01-mathematics.json, curated for the atlas by Claude Opus 5.5 at the direction of Danielle Fong (September 2026).”

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Revision 32 as rendered

Gerver's 1992 sofa, bounded by 18 curve sections, has area about 2.2195. In November 2024 Jineon Baek posted a proof that Gerver's sofa is optimal. Marked partial here until the proof completes review. That makes it a good candidate for a formal check.

Posed 1966, Leo Moser.

What would settle it

Lean statement in formal-conjectures

Sources

Geometry and topology · Mathematics