Similarites and difference! Computational Materials Physics › Forums › first Hohenberg-Kohn theorem › Similarites and difference! This topic has 0 replies, 1 voice, and was last updated 5 years, 7 months ago by Haseeb. Viewing 1 post (of 1 total) Author Posts October 11, 2017 at 1:47 pm #2372 HaseebParticipant Similarity: We can find external potential if we have ground state density and vice versa. Difference: For different potentials having the same ground state density, the difference in potential must be constant. 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