3-NIRVANA-user-guide/3.1-Code-basics.md

@@ -437,11 +437,12 @@ the following criteria:
     side) to decide whether a child block is to be created.
 
 -   Jeans-length-based (important in simulations involving selfgravity):
-    $$\left(\frac{\pi}{G}\frac{c_s^2}{\varrho}\right)^{1/2}
+    $\left(\frac{\pi}{G}\frac{c_s^2}{\varrho}\right)^{1/2}
     \cdot \mathcal{E}_\mathrm{Jeans}\left\{\begin{array}{ll}
     <\delta s & \mbox{refinement}\\
     >1.25\delta s & \mbox{derefinement}\\
-    \end{array}\right.$$ where the first factor is the local Jeans
+    \end{array}\right.$ 
+    where the first factor is the local Jeans
     length with $c_s$ the sound speed and $G$ the gravitational
     constant, and where $\delta s=\min\{\delta x,h_y\delta y, h_z\delta z\}$.
     $\mathcal{E}_\mathrm{Jeans}$ is a user-specific threshold giving the
@@ -455,7 +456,8 @@ the following criteria:
     \right)^{1/2}\cdot \mathcal{E}_\mathrm{Field}\left\{\begin{array}{ll}
     <\delta s & \mbox{refinement}\\
     >1.25\delta s & \mbox{derefinement}\\
-    \end{array}\right.$$ where the first factor is the Field length with
+    \end{array}\right.$$ 
+    where the first factor is the Field length with
     $L(\varrho, T)$ the density- and temperature-dependent heatloss
     function and $\kappa$ the thermal conduction coefficient.
     $\mathcal{E}_\mathrm{Field}$ is a user-specific threshold giving the