
********************************************************************************

                 Domain-decomposed deflation preconditioner

********************************************************************************


Files
-----

dfl_geometry.c      Geometry of the DFL_BLOCKS block grid.

dfl_modes.c         Computation of the global modes used to construct
                    the deflation subspace.

dfl_sap_gcr.c       SAP+GCR solver for the Wilson-Dirac equation with
                    local deflation.

dfl_subspace.c      Basic programs related to the deflation subspace.

ltl_gcr.c           GCR solver for the little Dirac equation Aw*psi=eta.


Include file
------------

The file dfl.h defines the prototypes for all externally accessible
functions that are defined in the *.c files listed above.
