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

src/ksp/pc/impls/jacobi/jacobi.c

Examples

src/ksp/ksp/tutorials/ex56.c

Implementations

PCJacobiSetRowl1Scale_Jacobi() in src/ksp/pc/impls/jacobi/jacobi.c

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Index of all PC routines
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Index of all manual pages