Code-equations/Gravitational-Potential-including-indirect-terms.md

@@ -8,14 +8,14 @@ The gravitational potential entering in the source terms of the Navier-Stokes eq
 we use  a cubic-potential of the form:
 
 $`\Phi _p = \left\lbrace \begin{array}{ll}
--{m_pG\over d} &  d > r_{\rm sm} \\
+-{m_pG\over d} &  d > r_{\rm sm}} \\
 -{m_pG\over d}f({d\over r_{\rm sm}}) & d\leq r_{\rm sm}   
 \end{array} \right.`$
 
 with $`f({d\over r_{\rm sm}}) = \left [ \left( {d\over r_{\rm sm}}\right)^4-2\left( {d\over r_{\rm sm}}\right)^3+2{d\over r_{\rm sm}} \right]`$;
   $`d`$ is the distance from the disc element to the planet, and $`r_{\rm sm}`$ the 
 smoothing length:
-$`r_{\rm sm} = \alpha _{sm} R_H`$, where $`\alpha _{sm}`$ is a smoothing parameter and
+$`r_{\rm sm} = \epsilon R_H`$, where $`\epsilon`$ is a smoothing parameter and
  $`R_H`$ is the Hill radius of the planet.
 
 To select this choice for a simulation in the config file: