A characterization of round spheres in terms of blocking light (Q2269701)
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| Language | Label | Description | Also known as |
|---|---|---|---|
| English | A characterization of round spheres in terms of blocking light |
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A characterization of round spheres in terms of blocking light (English)
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17 March 2010
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The authors prove that a closed Riemannian manifold has cross and sphere blocking if and only if it is isometric to a round sphere. Then they show that a closed Riemannian surface has cross blocking if and only if it is isometric to a constant curvature sphere or a projective space.
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Riemannian manifold
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cross blocking
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sphere blocking
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blocking number
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