Amalie Emmy Noether. Jewish mathematician born in Germany. She worked in abstract algebra and topology. Noethers theorem explained a one-to-one correspondence between symmetry groups and conservation laws. Her theorem is a great in the classic and quantum physics.
Bell's theorem, Bell's inequalities
Bell's theorem, probabilistic predictions about the results of spatially separated experiments that conflict, for appropriate choices of quantum states and experiments, with quantum mechanical predictions. Stanford Encyclopedia, Bell's theorem and inequalities explanations and the experimental tests.