Home › Forums › density functional theory › functions and functionals › Example functional This topic has 0 replies, 1 voice, and was last updated 2 months, 1 week ago by nvrafelg. Viewing 1 post (of 1 total) Author Posts October 2, 2024 at 5:22 pm #11437 nvrafelgParticipant In Lagrangian mechanics, the action functional is used to derive the Euler-Lagrange equation via the principle of stationary action. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In