births
Sofia Kovalevskaya, Russian-Swedish mathematician and physicist (died 1891)
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Sofya Kovalevskaya
Russian mathematician (1850–1891)
Sofya Vasilyevna Kovalevskaya was a Russian mathematician who made noteworthy contributions to analysis, partial differential equations and mechanics. She was a pioneer for women in mathematics around the world – the first woman to earn a doctorate in mathematics, the first…Source: Wikipedia (CC BY-SA)
January 15
Day of the year
January 15 is the 15th day of the year in the Gregorian calendar; 350 days remain until the end of the year.Source: Wikipedia (CC BY-SA)