From left to right and down: Emil Artin, Harry Bateman, George David Birkhoff, Augustin Cauchy, Alonzo Church, Rene Descartes, Jean Dieudonne, Leonhard Euler, Gottlob Frege, Karl Friedrich Gauss, David Hilbert, James Clerk Maxwell, Robert L. Moore, Marston Morse, Isaac Newton, Henri Poincare, Bernhard Riemann, Abraham Robinson, Alfred Tarski, Rene Thom, Alan M. Turing, Johann von Neumann, Andre Weil