PCJacobiType

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

Synopsis

typedef enum {
  PC_JACOBI_DIAGONAL,
  PC_JACOBI_ROWL1,
  PC_JACOBI_ROWMAX,
  PC_JACOBI_ROWSUM
} PCJacobiType;

Values

• PC_JACOBI_DIAGONAL - use the diagonal entry, if it is zero use one

• PC_JACOBI_ROWL1 - add sum of absolute values in row i, j != i, to diag_ii

• 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

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Index of all PC routines
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