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Hyperbolic geometry
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Non-Euclidean geometry
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In mathematics, hyperbolic geometry (also called Lobachevskian geometry or Bolyai–Lobachevskian geometry) is a non-Euclidean geometry. The parallel postulate of Euclidean geometry is replaced with:

Instance of
Areas of mathematics
Subclass of
Non-Euclidean geometry
Part of
Non-Euclidean geometry
Discoverer / Inventor
Nikolai Lobachevsky
Wikidata