Grete Hermann
Grete (Henry-)Hermann (* March 2, 1901 in Bremen, † April 15, 1984 in Bremen) was a German mathematician and philosopher noted for her work in mathematics, physics, philosophy and education. She is noted for her early philosophical work on the foundations of quantum mechanics, and is now known most of all for an early, but long-ignored refutation of a no-hidden-variable theorem by John von Neumann. The disputed theorem and the fact that Hermann's critique of this theorem remained nearly unknown for decades are considered to have had a strong influence on the development of quantum mechanics.
Read more about Grete Hermann: Mathematics, Assistant To Leonard Nelson, Quantum Mechanics, Political Activism, Emigration and Later Years