He was taught by Bernays, Carathéodory, Courant, Hilbert, Kneser, Edmund Landau and, of course, his supervisor Weyl .
Siya ay tinuturuan sa pamamagitan ng Bernays, Carathéodory, Courant, Hilbert, Kneser, Edmund Landau at, siyempre, ang kanyang mga superbisor Weyl.