Editing Quantization (physics) (section)

== Path integral quantization ==
{{further|Path integral formulation}}
{{see also|Lattice gauge theory}}
A classical mechanical theory is given by an [[action (physics)|action]] with the permissible configurations being the ones which are extremal with respect to functional [[Calculus of variations|variations]] of the action. A quantum-mechanical description of the classical system can also be constructed from the action of the system by means of the [[path integral formulation]].