Equivalently, we may choose any three linearly independent combinations of these quantities. Abbott abstract we explain the use of feynman diagrams to do perturbation theory in quantum mechanics. The number of ways to form a given feynman diagram by joining together halflines is large, and by. Their main use is to calculate the amplitude or rather itimes the amplitude for a state with speci. The resolving power of the eye is about 1120 of an inchthat is roughly the diameter of one of the little dots on the fine halftone reproductions in the encyclopaedia. This leads us to the last section, in which we merge these two aspects in order to derive an analytical series representation of the feynman integral. For a given feynman graph with n edges, l loops2 and the symanzik polynomials u and f, the feynman integral is given as an. This, when you demagnify it by 25,000 times, is still 80 angstroms in diameter32 atoms across, in an ordinary metal. In theoretical physics, a feynman diagram is a pictorial representation of the mathematical. Feynman quantum electrodynamics w a benjamin 1961 acrobat 7 pdf 7. Hypergeometric series representations of feynman integrals. Doing feynman diagrams on a computer 22 1 natural units to describe kinematics of some physical system or event we are free to choose units of measure of the three basic kinematical physical quantities.