Author

U. Mishra

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Preprint Aug 2026

Curves of constant width and Lebesgue's covering problem

A universal cover is a convex set in the plane that contains a congruent copy of every planar set of diameter one. Lebesgue asked in 1914 for one of least area, and the value is not known. We prove that every convex universal cover has area at least 0.8344, improving on 0.832, published in 2005, and 0.833, in a 2026 pr...

U. Mishra · 0 citations