Rie·mann·ian geometry
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Definition of Riemannian geometry
: 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
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“Riemannian geometry.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Riemannian%20geometry. Accessed 6 Mar. 2021.
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Time Traveler for Riemannian geometry
The first known use of Riemannian geometry was in 1896
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