PCJacobiType#

What elements of the matrix are used to form the Jacobi preconditioner

Synopsis#

typedef enum {
  PC_JACOBI_DIAGONAL,
  PC_JACOBI_ROWMAX,
  PC_JACOBI_ROWSUM
} PCJacobiType;

Values#

PC_JACOBI_DIAGONAL - use the diagonal entry, if it is zero use one
PC_JACOBI_ROWMAX - use the maximum absolute value in the row
PC_JACOBI_ROWSUM - use the sum of the values in the row (not the absolute values)

See Also#

Preconditioners, PCJACOBI, PC

Level#

intermediate

Location#

include/petscpctypes.h

Index of all PC routines
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