Functional Home › Forums › density functional theory › functions and functionals › Functional This topic has 0 replies, 1 voice, and was last updated 1 day, 8 hours ago by maartengm. Viewing 1 post (of 1 total) Author Posts October 22, 2026 at 2:02 pm #15412 maartengmParticipant E[\psi] = <\psi|H|\psi>/<\psi|\psi> 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