Riemannian Rigidity of the Parallel Postulate in Total Curvature
classification
🧮 math.DG
keywords
curvatureparallelplanepostulateriemanniantotalconjugateeuclidean
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We prove that the Euclidean plane is the only Riemannian plane with total curvature and free of conjugate points that satisfies Playfair's version of the parallel postulate.
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