Functional Home › Forums › density functional theory › functions and functionals › Functional This topic has 0 replies, 1 voice, and was last updated 20 hours, 50 minutes ago by jgd15. Viewing 1 post (of 1 total) Author Posts January 26, 2026 at 2:12 pm #14462 jgd15Participant The derivative of a function evaluated at a certain point is an example of a functional. 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