eff_NN.tex
bfb019efa901lammm-master

eff_NN.tex
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			\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}