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A quadrangle comparison theorem and its application to soul theory for Alexandrov spaces - MaRDI portal

A quadrangle comparison theorem and its application to soul theory for Alexandrov spaces (Q2430819)

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A quadrangle comparison theorem and its application to soul theory for Alexandrov spaces
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    A quadrangle comparison theorem and its application to soul theory for Alexandrov spaces (English)
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    8 April 2011
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    The authors derive two sufficient conditions for a complete finite-dimensional Alexandrov space of nonnegative curvature to be contractible. One of the new technical tools used in the proof is a quadrangle comparison theorem inspired by Perelman.
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    Alexandrov space with nonnegative curvature
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    soul theory
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    quadrangle comparison theorem
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