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そうきょくがく 双曲幾何学
Noun
1. hyperbolic geometryMathematics
Wikipedia definition
2. Hyperbolic geometryIn mathematics, hyperbolic geometry is a non-Euclidean geometry, meaning that the parallel postulate of Euclidean geometry is replaced. The parallel postulate in Euclidean geometry is equivalent to the statement that, in two dimensional space, for any given line R and point P not on R, there is exactly one line through P that does not intersect R; i.e. , that is parallel to R.
Read “Hyperbolic geometry” on English Wikipedia
Read “双曲幾何学” on Japanese Wikipedia
Read “Hyperbolic geometry” on DBpedia

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