203; Also in PDF format. Nikolay P. Dolbilin, The Delone Peak, 2010. 1890 births 1980 deaths 20th-century Russian mathematicians Mathematicians from Saint Petersburg People from Sankt-Peterburgsky Uyezd Corresponding Members of the USSR Academy of Sciences Members of the German Academy of Sciences Leopoldina Academic staff of the Moscow Institute of Physics and Technology Moscow State University alumni Academic staff of Saint Petersburg State University Recipients of the Order of Lenin Recipients of the Order of the Red Banner of Labour Geometers Russian people of French descent Sportspeople from Saint Petersburg Russian mountain climbers Soviet mathematicians Soviet mountain climbers