Comment on `Solutions to quasi-relativistic multi-configurative   Hartree-Fock equations in quantum chemistry', by C. Argaez & M. Melgaard
  In a recent paper published in Nonlinear Analysis: Theory, Methods & Applications, C. Argaez and M. Melgaard studied excited states for pseudo-relativistic multi-configuration methods. Their paper follows a previous work of mine in the non-relativistic case (Arch. Rat. Mech. Anal., 171, 2004). The main results of the paper of C. Argaez and M. Melgaard are correct, but the proofs are both wrong and incomplete. 
Mathieu Lewin
math-ph math.AP math.MP