Registration Mechanism

Before a user can successfully apply a elliptic solver to one of his problems, two things need to be done by the author who programs the solver.

• Register a class of elliptic equations Depending on the elliptic problem This provides the unique calling, the solving routines needs to have specific input data. The interface, which is called by the user, has to reflect these arguments. EllBase already offers several of these interfaces, but if you need to have a new one, you can provide your own.

• Register a solver for a particular elliptic equation class Once a class of elliptic equations has been made available as described above, the author can now register solvers for that particular class. Later a user will access the solver calling the interface with the arguments needed for the elliptic class and a name, under which a solver for this elliptic problem has been registered.

The registration process is part of the authors thorn, not part of EllBase. There is no need to change code in EllBase. Usually, a author of solver routines will register the routines that register an elliptic equation class and/or an elliptic solver in the STARTUP timebin. If a author registers both, class and solver, you must make sure, that the elliptic class is registered before the solver registration takes place.