Sofya Vasilyevna Kovalevskaya, born Korvin-Krukovskaya, 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 obtain a doctorate in mathematics, the first woman appointed to a full professorship in northern Europe and one of the first women to work for a scientific journal as an editor. According to historian of science Ann Hibner Koblitz, Kovalevskaya was "the greatest known woman scientist before the twentieth century".
Kovalevskaya in 1880
The excerpt from the 1850 birth register listing, in Russian Cyrillic, the birth of Sofia on January 3rd (Old Style date).
Kovalevskaya at 18 years
Kovalevskaya in 1890
Anne Jaclard, born Anna Vasilyevna Korvin-Krukovskaya (1843–1887), was a Russian socialist and feminist revolutionary. She participated in the Paris Commune and the First International and was a friend of Karl Marx. She was once courted by Fyodor Dostoyevsky, who published two of her stories in his journal. Her sister was the mathematician and socialist Sofia Kovalevskaya (1850–1891).
Anne Jaclard
Jaclard c. 1880