Lobachevskian geometry

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• Lobachevskian — adjective Of or pertaining to (1792–1856), Russian mathematician, or to his work, most notably on non Euclidean geometry …   Wiktionary

• 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

• 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

• Nikolai Lobachevsky — Portrait by Lev Kryukov (c.1843) Born December 1, 1792 Nizhny Novgoro …   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

• Wanda Szmielew — (* 5. April 1918 in Warschau; † 27. August 1976 ebenda) war eine polnische mathematische Logikerin. Szmielew studierte ab 1935 an der Universität Warschau, wobei sie sich unter Alfred Tarski und Lindenbaum mit mathematischer Logik beschäftigte.… …   Deutsch Wikipedia

• List of Russian mathematicians — Andrey Kolmogorov, a preeminent 20th century mathematician. This list of Russian mathematicians includes the famous mathematicians from the Russian Empire, the Soviet Union and the Russian Federation. This list is incomplete; you can help by …   Wikipedia