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单词 non-Euclidean geometry
释义
non-Euclidean geometry

Physics
  • A type of geometry that does not comply with the basic postulates of Euclidean geometry, particularly a form of geometry that does not accept Euclid’s postulate that only one straight line can be drawn through a point in space parallel to a given straight line. Several types of non-Euclidean geometry exist.


Mathematics
  • After unsuccessful attempts had been made at proving that the parallel postulate could be deduced from the other postulates of Euclid’s, the matter was settled by the discovery of non-Euclidean geometries by Lobachevsky and Bolyai. In these, all Euclid’s postulates hold except the parallel postulate. In hyperbolic geometry, given a point not on a given line, there are at least two lines through the point parallel to the line (i.e. these parallel lines do not intersect the given line). In elliptic geometry, given a point not on a given line, there are no parallels through the point. See elliptic plane, hyperbolic plane, neutral geometry.


Philosophy
  • See geometry.


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