de bene esse: literally, of well-being, morally acceptable but subject to future validation or exception
On this date in 1792, Nikolai Ivanovich Lobachevsky was born in Nizhny Novgorod in the Russian Empire. Lobachevsky earned his degree and became a professor at Kazan University where he taught math, physics, and astronomy. He is most well known for his development of a non-Euclidean geometry. In his hyperbolic geometry, the primary difference from Euclidean geometry is the postulate that for any given point there exists more than one line that passes through the point and is parallel to a given line that does not pass through the point. This results in a curved space in which the sum of the interior angles of a triangle is less than 180º.