I'm trying to understand the Hartree-Fock mathematical formulation I understand the Coulomb operator, but I dont understand the exchange operator:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]

\hat{K_{j}}[\Psi](\textbf{x})=\Phi_{j}(\textbf{x})\int

d\textbf{x}'\frac{\Phi_{j}^{*}(\textbf{x}')\Psi(\textbf{x}')}{|\textbf{r}-\textbf{r}'|}[/tex]

Can any one explain me why this operator is like this. I understand that it is the interaction of the j-th electron with the electrons' cloud but... how it come to be like that

thanks in advance

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# Hartree-Fock exchange operator

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