In a technique invented by this man, expectation values can be computed by differentiating the generating functional with respect to artificially introduced parameters; that operation can be written in DeWitt notation.
In a technique invented by this man, expectation values can be computed by differentiating the generating functional with respect to artificially introduced parameters; that operation can be written in DeWitt notation. This man invented a technique for evaluating integrals that rewrites 1 over AB as an extra integral over the reciprocal of "xA plus yB"-squared. That method introduces his namesake parameters and integrates them between zero and one. This man names a technique for evaluating contour integrals that goes under a pole on the left and over a pole on the right, giving his namesake time-ordered (*) propagator. Another of his inventions discretizes a space of interest and integrates over the possible values of a function at every discrete point, resulting in an integral of a complex exponential of the action. That method sums over all possible classical paths to find the quantum amplitude of a trajectory. For 10 points, name this physicist who developed the path integral formulation of quantum mechanics.
In a technique invented by this man, expectation values can be computed by differentiating the generating functional with respect to artificially introduced parameters; that operation can be written in DeWitt notation.
Richard Phillips Feynman