Corina (Cora) Eloísa Ratto de Sadosky (akak Cora Ratto, 1912–1981) was an Argentine mathematician, educator and militant activist in support of human and women's rights in Argentina and beyond. She played an important part in the Argentine University Federation supporting republican interests during the Spanish Civil War and helping victims of Falangist oppression. In 1941, following the Nazi invasion of the Soviet Union, she established and headed the anti-fascist Junta de la Victoria which stood for democracy and women's suffrage. In 1965, Ratto founded Columna 10, a journal denouncing the conduct of the United States in the Vietnam War. In the 1970s, she published a series of important mathematics text books.