Description: (Mathematician)
Nikolai Ivanovich Lobachevsky was a prominent Russian mathematician known for his groundbreaking contributions to hyperbolic geometry, now known as Lobachevskian geometry. His research on Dirichlet integrals, summarized in the Lobachevsky integral formula, solidified his legacy in the field. Lobachevsky was nicknamed the "Copernicus of Geometry" by William Kingdon Clifford for the transformative impact of his work. His innovative insights reshaped mathematical understanding and continue to influence geometric studies.