Дмитрий Андреевич Гудков – выдающийся математик и исследователь биографии Н.И. Лобачевского (к 100-летию со дня рождения)
Life and activities of Professor D.A. Gudkov (1918–1992) are described. His main mathematical result (1969) – the classification of real nonsingular 6th-degree curves – belongs to the difficult 16th problem of Hilbert. Gudkov formulated a conjecture (“Gudkov’s congruence”) about topology of nonsingular curve of any even degree. Arnold’s (1971) and Rokhlin’s (1972) works, proving this conjecture, have opened the modern stage in the development of the subject. Gudkov’s book “N.I. Lobachevsky. Biography Riddles” (1992) proved that the father of Nikolay Lobachevsky and his brothers was a Nizhny Novgorod land surveyor S.S. Shebarshin. Now this statement is generally accepted by experts.