eff_Ne.tex
2eeae0aade06runner

eff_Ne.tex
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			\documentclass[12pt]{article}

			\begin{document}

			$$
			E_{Ne} = - \frac{1}{{4\pi \varepsilon _0 }}\sum\limits_{i,j} {\frac{{Z_i }}{{R_{ij} }}Erf\left( {\frac{{\sqrt 2 R_{ij} }}{{s_j }}} \right)}
			$$

			\end{document}