Leopold Infeld (1889-1968). Born in Cracow, Poland.
Studied at the University of Cracow and received his doctorate in
1923. After teaching in Lwow/Lemberg, he became professor of
applied mathematics at the University of Toronto in 1938. Worked on
unitary field theory and quantum electrodynamics, with van der
Waerden on spinors, worked with Born on non-linear electrodynamics,
and with Einstein on equations of motion (“EIH paper”).