Gauge transformations are canonical transformations
Tai L. Chow · European Journal of Physics · 1997
It is shown that a gauge transformation is also a canonical transformation which preserves Hamilton's equation of motion, where and L are two different choices of Lagrangian of a dynamical system, and f is an arbitrary function of coordinates q and time t. Resumen. Sa presenta una derivacion sencilla y directa de los propiadades de transformaciones canonicas empezando de transformaciones `gauge'. Dicha derivacion no necesita la aplicacion de principios de Hamilton ni el calculo de variaciones.