Mark Kac improved upon a formula developed by this
Mark Kac improved upon a formula developed by this man to derive a solution to the heat equation with a cooling term. Along with Wheeler, he names an interpretation of electrodynamics based on time-inversion symmetry. With Hans Bethe, he developed a formula to calculate the yield of a fission bomb. In 1965 he received a Nobel prize along with Schwinger and Tomonaga for his work in quantum electrodynamics, and he developed the path integral formulation of quantum mechanics. His lectures at Caltech were compiled into a physics textbook. For 10 points, name this American physicist whose namesake diagrams depict the interactions of elementary particles.
Mark Kac improved upon a formula developed by this man to derive a solution to the heat equation with a cooling term.
Richard Phillips {Feynman} [OL/LC]