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lammps/doc/Eqs/stress_tensor.tex
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stress_tensor.tex
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			\documentclass[12pt]{article}

			\begin{document}

			\begin{eqnarray*}
			S_{ab} & = & - \left[ m v_a v_b +
			\frac{1}{2} \sum_{n = 1}^{N_p} (r_{1_a} F_{1_b} + r_{2_a} F_{2_b}) +
			\frac{1}{2} \sum_{n = 1}^{N_b} (r_{1_a} F_{1_b} + r_{2_a} F_{2_b}) + \right. \\
			&& \left. \frac{1}{3} \sum_{n = 1}^{N_a} (r_{1_a} F_{1_b} + r_{2_a} F_{2_b} +
			r_{3_a} F_{3_b}) +
			\frac{1}{4} \sum_{n = 1}^{N_d} (r_{1_a} F_{1_b} + r_{2_a} F_{2_b} +
			r_{3_a} F_{3_b} + r_{4_a} F_{4_b}) + \right. \\
			&& \left. \frac{1}{4} \sum_{n = 1}^{N_i} (r_{1_a} F_{1_b} + r_{2_a} F_{2_b} +
			r_{3_a} F_{3_b} + r_{4_a} F_{4_b}) +
			\sum_{n = 1}^{N_f} r_{i_a} F_{i_b} \right]
			\end{eqnarray*}

			\end{document}