MatLUInfo

Data based into the matrix LU factorization routines

Synopsis

typedef struct {
  PetscReal     fill;    /* expected fill; nonzeros in factored matrix/nonzeros in original matrix */
  PetscReal     dtcol;   /* tolerance for pivoting; pivot if off_diagonal*dtcol > diagonal */
  PetscReal     damping; /* scaling of identity added to matrix to prevent zero pivots */
  PetscReal     zeropivot; /* pivot is called zero if less than this */
  PetscReal     pivotinblocks;  /* for BAIJ and SBAIJ matrices pivot in factorization on blocks, default 1.0 
                                   factorization may be faster if do not pivot */
} MatLUInfo;

In Fortran these are simply double precision arrays of size MAT_LUINFO_SIZE

Notes: These are not usually directly used by users, instead use the PC type of LU All entries are double precision.

MatLUInfo

Synopsis

See Also