Closed Geodesics in Lorentzian Surfaces
classification
🧮 math.DG
math.DS
keywords
closedgeodesicslorentzianleastsurfacecausalclaimcontains
read the original abstract
We show that every closed Lorentzian surface contains at least two closed geodesics. Explicit examples show the optimality of this claim. Refining this result we relate the least number of closed geodesics to the causal structure of the surface and the homotopy type of the Lorentzian metric.
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