fix_rhok.tex
35f2cfa0bfafmaster

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

			\begin{document}

			\begin{eqnarray*}
			U &=& \frac{1}{2} K (\|\rho_{\vec{k}}\| - a)^2 \\
			\rho_{\vec{k}} &=& \sum_j^N \exp(-i\vec{k} \cdot \vec{r}_j )/\sqrt{N} \\
			\vec{k} &=& (2\pi n_x /L_x , 2\pi n_y /L_y , 2\pi n_z/L_z )
			\end{eqnarray*}

			\end{document}