单词	Riemannian geometry
释义	Riemannian geometry noun Rie·​mann·​ian geometry rē-ˈmä-nē-ən-  : a non-Euclidean geometry in which straight lines are geodesics and in which the parallel postulate is replaced by the postulate that every pair of straight lines intersects Word History Etymology G. F. B. Riemann First Known Use 1896, in the meaning defined above
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