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The sphere is the only closed surface satisfying the fixed-width Archimedean property

Lai, Mijia
arXiv (All) · Papers
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differential-geometry
Among Archimedes' many celebrated discoveries is a striking fact: the region of the unit sphere between two parallel planes, both meeting the sphere and separated by a distance $h$, has area $2πh$. We prove that, among connected smooth closed embedded surfaces in $\mathbb R^3$, this property charact
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