PCJacobiSetRowl1Scale#
Set scaling of off-diagonal of operator when computing l1 row norms, eg, Remark 6.1 in “Multigrid Smoothers for Ultraparallel Computing”, Baker et al, with 0.5 scaling
Synopsis#
#include "petscpc.h"
PetscErrorCode PCJacobiSetRowl1Scale(PC pc, PetscReal scale)
Logically Collective
Input Parameters#
pc - the preconditioner context
scale - scaling
Options Database Key#
-pc_jacobi_rowl1_scale
- use absolute values
See Also#
KSP: Linear System Solvers, PCJACOBI, PCJacobiSetType(), PCJacobiGetRowl1Scale()
Level#
intermediate
Location#
Examples#
Implementations#
PCJacobiSetRowl1Scale_Jacobi() in src/ksp/pc/impls/jacobi/jacobi.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages