Home › Forums › density functional theory › functions and functionals › Functional example This topic has 0 replies, 1 voice, and was last updated 2 years, 2 months ago by Jonas De Rijck. Viewing 1 post (of 1 total) Author Posts October 4, 2022 at 7:45 pm #6884 Jonas De RijckParticipant A (definite) integral is an example of a functional that I used a lot in mathematics to find an area or a volume. 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