sphere theorem
Sign in to saveAlso known as quarter-pinched sphere theorem
theorem stating that a complete, simply-connected, n-dimensional Riemannian manifold with sectional curvature taking values in the interval (1, 4] is homeomorphic to the n-sphere
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International Standard Serial Number
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International Standard Book Number
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digital object identifier
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JSTOR
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bibcode
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Q118398
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homeomorphism
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Riemannian geometry
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Q22908627
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American Mathematical Society
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Riemannian manifold
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simply connected space
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Heinz Hopf
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Mathematical Reviews
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diffeomorphism
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n-sphere
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Richard Schoen
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German Mathematical Society
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Ricci flow
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Marcel Berger
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