3-NIRVANA-user-guide/3.2-User-interfaces.md

@@ -577,11 +577,11 @@ possible values or a numeric range.
         from the momentum equation and the induction equation is not
         solved.
 
-    -   `_C.permeability_rel`: relative magnetic permeability $\mu_{rel}$ 
-        ($=\mu/\mu_0$,$\mu_0=4\pi\cdot10^{-7}\mathtt{V}\cdot\mathtt{m}^{-1}\cdot\mathtt{A}^{-1}\cdot\mathtt{s}^{-1}$).
+    -   `_C.permeability_rel`: relative magnetic permeability $\mu_{rel}$
+        ($=\mu/\mu_0$,$\mu_0=4\pi\cdot 10^{-7}V\cdot m^{-1}\cdot A^{-1}\cdot s^{-1}$).
 
         **Important:** The Gaussian unit system can be mimicked by
-        choosing a value ${\tt \_C.permeability\_rel}=10^7$ so that
+        choosing a value `_C.permeability_rel`$=10^7$ so that
         the magnetic permeability is $\mu=4\pi$.
 
 -   `02` (`_C.viscosity`, `_C.viscosity_coeff`)