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Timeline for Length spectrum of spheres

Current License: CC BY-SA 3.0

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Feb 29, 2012 at 21:54 comment added alvarezpaiva I just wanted to add that I don't know of any examples of Riemannian metrics on the projective plane that have the same length spectrum. For reversible Finsler metrics, the example above with the unit spheres in a normed space and its dual will pass to ${\mathbb RP}^2$.
Feb 29, 2012 at 20:27 vote accept Igor Rivin
Feb 29, 2012 at 18:10 history answered alvarezpaiva CC BY-SA 3.0