Home › Forums › density functional theory › correlation › Different definitions This topic has 0 replies, 1 voice, and was last updated 2 years, 2 months ago by Dietger Van den Eynden. Viewing 1 post (of 1 total) Author Posts October 6, 2022 at 7:25 pm #6960 Dietger Van den EyndenParticipant Because the classical problems can be solved analytically which is not the case for quantum systems 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