# Editing Weeks-Chandler-Andersen perturbation theory

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:<math> | :<math> | ||

β | + | u_{\rm repulsive} (r) = \left\{ | |

\begin{array}{ll} | \begin{array}{ll} | ||

\Phi_{\rm LJ}(r) + \epsilon & {\rm if} \; r < 2^{1/6}\sigma \\ | \Phi_{\rm LJ}(r) + \epsilon & {\rm if} \; r < 2^{1/6}\sigma \\ | ||

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:<math> | :<math> | ||

β | + | u_{\rm attractive} (r) = \left\{ | |

\begin{array}{ll} | \begin{array}{ll} | ||

-\epsilon & {\rm if} \; r < 2^{1/6}\sigma \\ | -\epsilon & {\rm if} \; r < 2^{1/6}\sigma \\ |