13 lines
236 B
TeX
13 lines
236 B
TeX
\documentstyle[12pt]{article}
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\begin{document}
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\begin{eqnarray}
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U &=& \frac{A_{ss}}{36} \left[ \left( \frac{\sigma}{r}
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\right)^{12} - \left( \frac{ \sigma}{r} \right)^6 \right], ~~
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r < r_c \nonumber
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\end{eqnarray}
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\end{document}
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