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Теорема о сфере

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Also 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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Article · Русский

Теорема о сфере — общее название теорем, дающих достаточные условия на риманову метрику, гарантирующие гомеоморфность или диффеоморфность многообразия стандартной сфере.

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