geometry-topology / Metric geometry

Makeev's conjecture on universal cover

Let $U_n\subset\mathbb R^n$ be the dual of the difference polytope of a regular $n$-simplex such that $U_n$ circumscribes a sphere of diameter 1. Then every set of diameter 1 in $\mathbb R^n$ is covered by a rotated copy of $U_n$.

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geometry-topologyAug 10, 2026Significance 15/100Registry: unreviewed

Makeev's conjecture on universal cover

Prior state unknowndisproved

Makeev conjectured it to be true for all dimensions. This result disproves it for dimensions 4 and 5. Dimensions 6 and above remain open.

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Let $U_n\subset\mathbb R^n$ be the dual of the difference polytope of a regular $n$-simplex such that $U_n$ circumscribes a sphere of diameter 1. Then every set of diameter 1 in $\mathbb R^n$ is covered by a rotated copy of $U_n$.

Makeev conjectured it to be true for all dimensions. This result disproves it for dimensions 4 and 5. Dimensions 6 and above remain open.

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Makeev's conjecture on universal cover — Mathematical Frontier Network