Actual source code: deflation.h
petsc-3.13.6 2020-09-29
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      4:  #include <petsc/private/pcimpl.h>
      5:  #include <petscksp.h>

      7: typedef struct {
      8:   PetscBool   init;            /* do only init step - error correction of direction is omitted */
      9:   PetscBool   correct;         /* add CP (Qr) correction to descent direction */
     10:   PetscScalar correctfact;
     11:   PetscInt    reductionfact;
     12:   Mat         W,Wt,WtA,WtAW;    /* deflation space, coarse problem mats */
     13:   KSP         WtAWinv;         /* deflation coarse problem */
     14:   KSPType     ksptype;
     15:   PC          pc;              /* additional preconditioner */
     16:   Vec         work;
     17:   Vec         *workcoarse;
     18:   const char  *prefix;

     20:   PCDeflationSpaceType spacetype;
     21:   PetscInt             spacesize;
     22:   PetscInt             lvl;
     23:   PetscInt             maxlvl;
     24:   PetscBool            extendsp;
     25: } PC_Deflation;

     27: PETSC_INTERN PetscErrorCode PCDeflationComputeSpace(PC);

     29: #endif