Prefer a chat interface with context about you and your work?
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>V</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mo>โ</mml:mo><mml:mi>M</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>approximation for atomic calculations
We demonstrate that $V^{N-M}$ approximation is a good starting point for the configuration interaction calculations for many-electron atoms and ions. $N$ is the total number of electrons in the neutral atom, $M$ is the number of valence electrons. $V^{N-M}$ is the self-consistent Hartree Fock potential for a closed-shell ion with โฆ