Professor D.A. Gudkov (1918–1992) – an outstanding mathematician and the researcher of Lobachevsky's biography (to the 100 anniversary since birth)
Lobachevsky State University of Nizhni Novgorod 23 Prospekt Gagarina (Gagarin Avenue) 603950 Nizhni Novgorod, Russia
The talk about life and scientific activity of the Professor of the Nizhny Novgorod university D. A. Gudkov who was my teacher. Gudkov's conjecture about of congruence for schemes of real curves of the even degree opened a new stage in a research of topology of real algebraic varieties, i. e. in the solution of the task included by D. Hilbert in his 16th problem. Gudkov's researches concerning N.I. Lobachevsky's biography dispelled the myth about N.I. Lobachevskiy origin from poor family.