Original: JÃ nos Bolyai (pronounced) (December 15, 1802 â "January 27, 1860) was a Hungarian mathematician, known for his work in non-Euclidean geometry.
Simplified: JÃ nos Bolyai (December 15, 1802 â "January 27, 1860) was a Hungarian mathematician, known for his work in non-Euclidean geometry.