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1. Non-Euclidean geometry: Non-Euclidean geometry is a form of geometry that rejects Euclid's fifth postulate that parallel lines extend to infinity and never intersect. There are two main forms of non-Euclidean geometry, hyperbolic, and elliptic. [100%] 2023-02-27 [Geometry]
2. Non-Euclidean geometry: In mathematics, non-Euclidean geometry consists of two geometries based on axioms closely related to those that specify Euclidean geometry. As Euclidean geometry lies at the intersection of metric geometry and affine geometry, non-Euclidean geometry arises by either replacing ... (Two geometries based on axioms closely related to those specifying Euclidean geometry) [100%] 2022-06-22 [Non-Euclidean geometry]
3. Models of non-Euclidean geometry: Models of non-Euclidean geometry are mathematical models of geometries which are non-Euclidean in the sense that it is not the case that exactly one line can be drawn parallel to a given line l through a point that ... [77%] 2023-06-12 [Classical geometry]