Geometrical Researches On The Theory Of Parallels

Geometrical Researches On The Theory Of Parallels is a mathematical treatise written by Nicholas Lobachevski, a Russian mathematician, in 1840. The book explores the concept of parallel lines and challenges the traditional Euclidean geometry that had been accepted for centuries. Lobachevski introduces a non-Euclidean geometry that allows for the existence of multiple parallel lines through a single point.