pair_coul_diel.tex
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pair_coul_diel.tex
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			\documentclass[12pt]{article}
			\pagestyle{empty}
			\begin{document}

			\begin{eqnarray*}
			E & = & \frac{Cq_iq_j}{\epsilon r} \left( \frac{\epsilon}{\epsilon_D(r)}-1\right) \qquad r < r_c \\
			\epsilon_D(r) & = & \frac{5.2+\epsilon}{2} + \frac{\epsilon-5.2}{2}\tanh\left(\frac{r-r_{me}}{\sigma_e}\right)
			\end{eqnarray*}
			\end{document}