János Bolyai

János Bolyai was a Hungarian mathematician who revolutionized geometry in the 19th century by creating non-Euclidean geometry. Traditionally, geometry was based on Euclid's postulates, especially the parallel postulate, which states that through a point not on a line, only one parallel line can be drawn. Bolyai's work showed that this postulate could be replaced, leading to the discovery that multiple parallel lines can exist. His ideas contributed to a deeper understanding of space and paved the way for advances in mathematics and physics, influencing theories such as Einstein's general relativity.