An oriented surface for which every point belongs to a Wiedersehen pair. Proof of the Blaschke conjecture established that the only Wiedersehen surfaces are the standard round spheres.
Wiedersehen Surface
See also
Blaschke Conjecture, Wiedersehen PairThis entry contributed by Margherita Barile
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References
Blaschke, W. Vorlesung über Differentialgeometrie I. Berlin: Springer-Verlag, 1921.Klingenberg, W. Course in Differential Geometry. New York: Springer-Verlag, p. 164, 1978.Referenced on Wolfram|Alpha
Wiedersehen SurfaceCite this as:
Barile, Margherita. "Wiedersehen Surface." From MathWorld--A Wolfram Web Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/WiedersehenSurface.html