Though Lobachevsky published his work a few years earlier than Bolyai , it contained only hyperbolic geometry .
In 1848 Bolyai discovered that Nikolai Ivanovich Lobachevsky had published a similar piece of work in 1829 .
Though Nikolai Ivanovich Lobachevsky published Bolyai 's work a few years earlier Bolyai Bolyai , it contained only hyperbolic geometry .
In 1848 Bolyai discovered that Nikolai Ivanovich Lobachevsky had published a similar piece of work in 1829 .