What is Nikolai Ivanovich Lobachevsky?
[[File:Nikolay Ivanovich Lobachevsky.jpeg|thumb|Nikolay Ivanovich Lobachevsky]] '''Nikolai Ivanovich Lobachevsky''' ({{lang-ru|Никола́й Ива́нович Лобаче́вский}}, 1792–1856) was a [[Russia]]n [[mathematician]]. He became known for his achievements in [[non-Euclidean geometry]]. == Biography == Lobachevsky was born in [[Nizhny Novgorod]], [[Russia]]. His parents were Ivan Maksimovich Lobachevsky, a clerk in a [[surveying|landsurveying]] office, and Praskovia Alexandrovna Lobachevskaya. In 1800, his father died and his mother moved to [[Kazan]]. In Kazan, Nikolai Ivanovich Lobachevsky attended [[Kazan Gymnasium]]. He graduated in 1807 and then went to [[Kazan State University|Kazan University]] which was founded just three years earlier, in 1804. At Kazan University, Lobachevsky was influenced by professor [[Johann Christian Martin Bartels]] (1769–1833). Bartels was a former teacher and friend of German mathematician [[Carl Friedrich Gauss]]. Lobachevsky received a [[Master's degree]] in [[physics]] and mathematics in 1811. In 1814, he became a lecturer at Kazan University, and in 1822 he became a full [[professor]]. He served in many administrative positions and was the [[rector]] of Kazan University from 1827 to 1846. He retired (or was dismissed) in 1846. After this event his health rapidly deteriorated. In addition to teaching mathematics and physics at Kazan University Lobachevsky also was an astronomy teacher there. In 1832, he married Varvara Alexivna Moisieva. They had seven children. {{bio-stub}} {{authority control}} {{DEFAULTSORT:Lobachevsky, Nikolai Ivanovich}} [[Category:1792 births]] [[Category:1856 deaths]] [[Category:Russian geometers]] [[Category:People from Tatarstan]]