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[lammps.git] / doc / src / Eqs / eff_NN.tex

\documentclass[12pt]{article}

\begin{document}

$$ 
E_{NN}  = \frac{1}{{4\pi \varepsilon _0 }}\sum\limits_{i < j} {\frac{{Z_i Z_j }}{{R_{ij} }}}
$$

\end{document}