RightHandSideExpression

Right hand side expressions are all expressions on the right of the "="-sign. For example, an expression in USER_common_variables could look like this: Each of the expressions, separated by comma, can be of three different types.

2. Arithmetic expression in-between []-brackets: [ ... Y%ind_...% ... ] Example:
   BC_v($...$) = ( ... , [ ... Y%ind_...% ... ], ... )
3. Link to an existing equation: equn{$EqnName$} Example:
   BC_v($...$) = ( ... , equn{$EqnName$}, ... )
   In this case, the equation needs to be defined somewhere in the input file:
   begin_equation{$EqnName$} BodyOfEquation end_equation
4. Link to an existing curve: curve{$CrvName$}depvar{%ind_Var%} Example:
   BC_v($...$) = ( ... , curve{$CrvName$}, ... )
   In this case, the curve must be defined somewhere in the input file:
   begin_curve{$CrvName$}, depvar_default{%ind_Var%} BodyOfCurve end_curve
   %ind_Var% defines the quantity/entity the left column of the curve is representing (independent variable). See also 1D_Curves.