Aleksandr Nikolayevich Korkin (March 3, 1837 - September 1, 1908, all New Style) was a Russian mathematician. He made contribution to the development of partial differential equations. March 3 is the 62nd day of the year in the Gregorian Calendar (63rd in leap years). ... | Queen Victoria, Queen of the United Kingdom (1837 - 1901) 1837 was a common year starting on Sunday (see link for calendar). ... September 1 is the 244th day of the year (245th in leap years). ... 1908 (MCMVIII) is a leap year starting on Wednesday (link will take you to calendar). ... In Britain and countries of the British Empire, Old Style or O.S. after a date means that the date is in the Julian calendar, in use in those countries until 1752; New Style or N.S. means that the date is in the Gregorian calendar, adopted on 14 September... This article is in need of attention from an expert on the subject. ... In mathematics, and particularly in analysis, an ordinary differential equation (or ODE) is an differential equation that contains functions of only one independent variable, and derivatives in that variable. ...