PCJacobiType#
Determines what elements of the matrix are used to form the Jacobi preconditioner, that is with the PCType of PCJACOBI
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#
Level#
intermediate
Location#
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages