\def\GWslide{\begin{frame} \frametitle{Three ways to confine plasma}
\bc Lawson criterion: $n \tau_E \ge 1.5 \cdot 10^{20} \frac{\mathrm{s}}{\mathrm{m}^3}$\ec 
  \begin{figure}[t]
    \centering
    \GWig{width=0.7\textwidth}{Theory/Fusion/FusionIntro/ThreeWaysToConfinePlasma/figs/udrzeni.jpg}
  \end{figure}
\end{frame}}