Kevin Lee added begin_equation_sigma__xy_v__.tex  over 8 years ago

Commit id: a9dd0b3ad3fb1c4ed1d080d2c3b93ccb5a7783e8

deletions | additions      

         

\begin{equation}  \sigma_{xy}=v\frac{e^2}{h}  \end{equation}  \begin{equation}  v=\frac{1}{2\pi}\int_{BZ}d^2kb_z(k)  \end{equation}