Home › Forums › density functional theory › functions and functionals › Functional This topic has 0 replies, 1 voice, and was last updated 1 week, 1 day ago by Jaroslav_Martynov. Viewing 1 post (of 1 total) Author Posts October 4, 2025 at 10:08 pm #13404 Jaroslav_MartynovParticipant We use functionals in quantum chemistry – in variational principle, in the energy during the derivations of the Hartree-Fock equations. 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