Elizaveta Litvinova was the second woman to receive a Ph.D. in mathematics. A competent mathematician, she was denied the possibility to teach and research at high levels in Russia. She was a friend of Sofia Kovalevskaya and wrote a biography of her and of other mathematicians. She also wrote around 70 articles on teaching mathematics.
Find out more at: https://mathshistory.st-andrews.ac.uk/Biographies/Litvinova/