Prof.Subramanian of Indira Gandhi Centre for Atomic Energy (IGCAR)
upon having listened to a short talk of mine at CMI on the Lagrangian
approach to electrodynamics invited me to give a more elaborate seminar
on that topic at IGCAR. I delivered an official colloquium at IGCAR in
July 2007 , on the action functional approach to electrodynamics and
also some introductory ideas of the gauge principle like how
electrodynamics can be understood as an U(1) gauge field.
The transcript of the action functional part of the seminar can be
viewed at ::
Action
functional approach to electrodynamics.(Realizing Maxwell's equations
as Euler-Lagrange equations of an action)