\begin{table}%t1
\caption{\label{tab:div}Divergence in the three different geometries handled by HERACLES.}
\small%\centering
\par
\begin{tabular}{llrlrl}
\hline\hline
&Cartesian & Cylindrical && Spherical &\\
\hline\noalign{\smallskip}
&$\nabla\cdot\vec{ P}_{x} $&$ \partial_{\rm r} P_{rr} + \nabla_{\theta,z}\cdot\vec{ P}_{r} $&$+ \frac{P_{rr}-P_{\theta\theta}}{r} $&$ \partial_{\rm r} P_{rr} + \nabla_{\theta,\phi}\cdot\vec{ P}_{r} $&$+ \frac{2 P_{rr}-P_{\theta\theta}-P_{\phi\phi}}{r} $\\
$\nabla \cdot {\mathbb P}=$&$\nabla\cdot\vec{ P}_{y} $&$\frac{1}{r}\nabla\cdot(r \vec{ P_{\theta}})$& &$\frac{1}{r}\partial_\theta P_{\theta\theta} + \frac{1}{r}\nabla_{r,\phi}\cdot(r \vec{ P_{\theta}}) $&$+ \cot \theta \frac{P_{\theta\theta}-P_{\phi\phi}}{r}$ \\
&$\nabla\cdot\vec{ P}_{z} $&$\nabla\cdot\vec{ P}_{z} $& &$ \frac{1}{r \sin \theta}\nabla\cdot(r \sin \theta \vec{ P_{\phi}})$& \\\noalign{\smallskip}
\hline
\end{tabular}
\end{table}