| D03RAF | General system of second-order PDEs, method of lines, finite differences, remeshing, two space variables, rectangular region |
| D03RBF | General system of second-order PDEs, method of lines, finite differences, remeshing, two space variables, rectilinear region |
| D03RYF | Check initial grid data in D03RBF |
| D03RZF | Extract grid data from D03RBF |