- Lobachevskian
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Of or pertaining to (1792–1856), Russian mathematician, or to his work, most notably on non-Euclidean geometry.
Wikipedia foundation.
Wikipedia foundation.
Lobachevskian — … Useful english dictionary
Nikolai Lobachevsky — Portrait by Lev Kryukov (c.1843) Born December 1, 1792 Nizhny Novgoro … Wikipedia
Hyperbolic geometry — Lines through a given point P and asymptotic to line R. A triangle immersed in a saddle shape plane (a hyperbolic paraboloid), as well as two diverging ultraparall … Wikipedia
Inversive geometry — Not to be confused with Inversive ring geometry. In geometry, inversive geometry is the study of those properties of figures that are preserved by a generalization of a type of transformation of the Euclidean plane, called inversion. These… … Wikipedia
Non-Euclidean geometry — Behavior of lines with a common perpendicular in each of the three types of geometry Non Euclidean geometry is the term used to refer to two specific geometries which are, loosely speaking, obtained by negating the Euclidean parallel postulate,… … Wikipedia
Euclid's Elements — (Greek: polytonic|Στοιχεῖα) is a mathematical and geometric treatise consisting of 13 books written by the Greek mathematician Euclid in Alexandria circa 300 BC. It comprises a collection of definitions, postulates (axioms), propositions… … Wikipedia
Marilyn vos Savant — Born Marilyn Mach August 11, 1946 (1946 08 11) (age 65) St. Louis, Missouri, United States Occupation Author Known for magazine column; Gu … Wikipedia
Hyperbolic motion — In geometry, a hyperbolic motion is a mapping of a model of hyperbolic geometry that preserves the distance measure in the model. Such a mapping is analogous to congruences of Euclidean geometry which are compositions of rotations and… … Wikipedia
Milne model — General relativity Introduction Mathematical formulation Resources Fundamental concepts … Wikipedia
hyperbolic geometry — Geom. the branch of non Euclidean geometry that replaces the parallel postulate of Euclidean geometry with the postulate that two distinct lines may be drawn parallel to a given line through a point not on the given line. Cf. Riemannian geometry … Universalium