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A History of Non-Euclidean Geometry: Evolution of the Concept of a Geometric Space/en-ca/a-history-of-non-euclidean-geometry-evolution-of-the-concept-of-a-geometric-space/E7D30071-350B-4DE9-85B2-7C51068268F9.htmlE7D30071-350B-4DE9-85B2-7C51068268F9
A History of Non-Euclidean Geometry: Evolution of the Concept of a Geometric Space