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Blaschke Conjecture

The only Wiedersehen Manifolds are the standard round spheres. The conjecture has been proven by combining the Berger-Kazdan Comparison Theorem with A. Weinstein's results for $n$ Even and C. T. Yang's for $n$ Odd.


Chavel, I. Riemannian Geometry: A Modern Introduction. New York: Cambridge University Press, 1994.

© 1996-9 Eric W. Weisstein