pair_gromacs.tex
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	\documentstyle[12pt]{article}

	\begin{document}

	\begin{eqnarray*}
	E_{LJ} & = & 4 \epsilon \left[ \left(\frac{\sigma}{r}\right)^{12} -
	\left(\frac{\sigma}{r}\right)^6 \right] + S_{LJ}(r)
	\qquad r < r_c \\
	E_C & = & \frac{C q_i q_j}{\epsilon r} + S_C(r) \qquad r < r_c \\
	S(r) & = & C \qquad r < r_1 \\
	S(r) & = & \frac{A}{3} (r - r_1)^3 + \frac{B}{4} (r - r_1)^4 + C \qquad r_1 < r < r_c \\
	A & = & (-3 E'(r_c) + (r_c - r_1) E''(r_c))/(r_c - r_1)^2 \\
	B & = & (2 E'(r_c) - (r_c - r_1) E''(r_c))/(r_c - r_1)^3 \\
	C & = & -E(r_c) + \frac{1}{2} (r_c - r_1) E'(r_c) - \frac{1}{12} (r_c - r_1)^2 E''(r_c)) \\
	\end{eqnarray*}

	\end{document}