eff_ee.tex
2eeae0aade06runner

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

			\begin{document}

			$$
			E_{ee} = \frac{1}{{4\pi \varepsilon _0 }}\sum\limits_{i < j} {\frac{1}{{r_{ij} }}Erf\left( {\frac{{\sqrt 2 r_{ij} }}{{\sqrt {s_i^2 + s_j^2 } }}} \right)}
			$$

			\end{document}