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 WoutStoffels. Viewing 1 post (of 1 total) Author Posts September 26, 2022 at 9:57 am #6531 WoutStoffelsParticipant Richard Feynman has a famous ‘path integral’ formulation of quantum mechanics, in which a functional integral over all possible trajectories for a particle is taken. 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