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Path Integrals. PathintegralswereinventedbyFeynman(whileagraduatestudent!) asanalternative. formulation of quantum mechanics. Our goal in this chapter is to show that quantum. mechanics and quantum ï¬eld theory can be completely reformulated in terms of. path integrals. The path integral formulation is particularly useful for quantum ï¬eld.
For the environment variable, see PATH (variable). A path, the general form of the name of a file or directory, specifies a unique location in a file system. A path points to a file system location by following the directory tree hierarchy expressed in a string of characters in which path components, separated by a delimiting character, represent each directory.