January 15, 1850 (on Jiyou In twelfth lunar month, the third), the Russian woman mathematician Sophie Kewaliefu, Kaya was born. In In 1850, (on female TodayOnHistory.com) Russia mathematician Sophie Kewaliefu, Kaya was born in an aristocratic family in Moscow. The Russian universities gate closed on women, Sophie, after a series of setbacks, finally entered the University of Heidelberg, Germany. In 1874, she completed Abel's integral and Saturn's rings, three papers on partial differential equations, without oral waivers obtained excellent Ph.D. granted by the University of Goettingen, Germany math center " diploma. 1889 Sophie become the first woman Corresponding Member of the Stockholm Academy of Sciences. February 10, 1891, Sophie died from influenza in Stockholm, only 41-year-old.