https://neckpinch.com/authors/stefan-suhr/New arXiv papers by Stefan Suhr, from Neckpinch Tue, 10 Nov 2026 04:10:28 GMT https://neckpinch.com/papers/2002.00415/arxiv:2002.00415Sun, 02 Feb 2020 00:00:00 GMTGuido De Philippis, Michele Marini, Marco Mazzucchelli, Stefan Suhr — We extend two celebrated theorems on closed geodesics of Riemannian 2-spheres to the larger class of reversible Finsler 2-spheres: Lusternik-Schnirelmann's theorem asserting the existence of three simple closed geodesics, and Bangert-Franks-Hingston's theorem asserting the existence of infinitely many closed geodesics. In order to prove the first theorem, we employ the generalization of Grayson's curve shortening flow developed by Angenent-Oaks.Curve shortening