deletions | additions       diff --git a/At_the_band_center_the__.tex b/At_the_band_center_the__.tex  index 52f10f8..d9bdf09 100644  --- a/At_the_band_center_the__.tex  +++ b/At_the_band_center_the__.tex 
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\begin{equation}  \Delta n(r) =\frac{2}{\pi}\Im m \int_{-\infty}^{\infty} d\omega f(\omega, T) \exp{[-2ir\phi(\omega)]} \frac{\Gamma/2t}{\omega-\epsilon_d+i\Gamma/2}   \end{equation}