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

@@ -845,7 +845,7 @@ considered primary.
 
 *Note: In case magnetic field splitting is enabled
 (cf. [Functionality overview](3.1-Code-basics#functionality-overview))
-the variable **B** represents the residual magnetic field which
+the variable* **B** *represents the residual magnetic field which
 must be initialized instead of the total field. Likewise, *e* represents
 the residual total energy density.*
 
@@ -1847,15 +1847,15 @@ An example can be found in the testproblem
 ## User-defined background magnetic field
 
 The module `sourceB0User.c` serves as template
-for coding a background magnetic field, **B**<sup>0</sub>, in the context
+for coding a background magnetic field, **B**<sub>0</sub>, in the context
 of the magnetic field splitting formalism.
-**B**<sup>0</sup> must be a time-independent, divergence-free potential field, i.e.,
+**B**<sub>0</sub> must be a time-independent, divergence-free potential field, i.e.,
 
-$\partial_t$**B**<sup>0</sub>=0,
+$\partial$<sub>t</sub>**B**<sub>0</sub>=0,
 
-∇⋅**B**<sup>0</sup>=0
+∇⋅**B**<sub>0</sub>=0
 
-∇×**B**<sup>0</sup>=0.
+∇×**B**<sub>0</sub>=0.
 
 In the call of `sourceB0User()`
 the function arguments are the pointer to the array `B0` of magnetic field