"J\u00E1nos Bolyai (Hungarian: [\u02C8ja\u02D0.no\u0283 \u02C8bo.j\u0252.i]; 15 December 1802 \u2013 27 January 1860) or Johann Bolyai, was a Hungarian mathematician, one of the founders of non-Euclidean geometry \u2014 a geometry that differs from Euclidean geometry in its definition of parallel lines. The discovery of a consistent alternative geometry that might correspond to the structure of the universe helped to free mathematicians to study abstract concepts irrespective of any possible connection with the physical world."@en . . . . . . "1802-12-15Z"^^ . "J\u00E1nos Bolyai"@en . "Hungarian mathematician" . . "1802Z"^^ . . . . . "1860Z"^^ . . . . "1860-01-27Z"^^ . "Bolyai, Janos"@en . .