Actual source code: fcgimpl.h
petsc-3.10.5 2019-03-28
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      4:  #include <petsc/private/kspimpl.h>

      6: typedef struct {
      7:   KSPCGType    type;        /* type of system (symmetric of Hermitian) */
      8:   PetscScalar  emin,emax;           /* eigenvalues */
      9:   PetscInt     ned;                 /* size of following arrays */
     10:   PetscScalar  *e,*d;
     11:   PetscReal    *ee,*dd;             /* work space for Lanczos algorithm */
     12:
     13:   PetscInt     mmax;        /* The maximum number of P/C vectors to store */
     14:   PetscInt     nprealloc;   /* How many vectors to preallocate */
     15:   PetscInt     nvecs;       /* How many P/C vecs are actually stored */
     16:   PetscInt     vecb;        /* How many vecs to allocate at a time in a chunk */
     17:   Vec          *Pvecs, *Cvecs, **pPvecs, **pCvecs; /* Arrays of vectors, and arrays of pointers to them */
     18:   PetscInt     *chunksizes; /* Chunk sizes allocated */
     19:   PetscInt     nchunks;     /* Number of chunks */
     20:   KSPFCDTruncationType truncstrat;
     21: } KSP_FCG;

     23: #endif