DDM solvers

Preconditioner with overlap

To use Schwarz preconditioners with overlap, there are two possibilities using Htool.DDMSolverBuilder:

• Reuse a previous Htool.HMatrix associated with the local problem without overlap. Typically, it can be taken from a Htool.DistributedOperator using \(\mathcal{H}\)-matrices for compression. See second overload of Htool.DDMSolverBuilder.__init__().

• Assemble a Htool.HMatrix associated with the local problem with overlap. See thid overload of Htool.DDMSolverBuilder.__init__().

Note

In both cases, additional information about the partitioning need to be given to Htool.DDMSolverBuilder constructors.