Home › Forums › density functional theory › functions and functionals › Functional This topic has 0 replies, 1 voice, and was last updated 1 week, 4 days ago by Tuur.B. Viewing 1 post (of 1 total) Author Posts October 1, 2025 at 5:14 pm #13315 Tuur.BParticipant The action integral in Lagrangian mechanics is a example of a functional, it assigns a value to an path of motion. 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