1: int GridCreateVarOrdering_Triangular_2D(Grid, FieldClassMap, VarOrdering *); 2: int GridCreateLocalVarOrdering_Triangular_2D(Grid, int, int *, LocalVarOrdering *); 3: int GridVarOrderingConstrain_Triangular_2D(Grid, int, PetscConstraintObject, FieldClassMap, VarOrdering, VarOrdering *); 4: int GridCreateVarScatter_Triangular_2D(Grid, VarOrdering, GVec, VarOrdering, GVec, VecScatter *);