petsc-3.13.6 2020-09-29
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PCFactorReorderForNonzeroDiagonal
reorders rows/columns of matrix to remove zeros from diagonal
Synopsis
#include "petscpc.h"
PetscErrorCode
PCFactorReorderForNonzeroDiagonal
(
PC
pc,
PetscReal
rtol)
Logically Collective on
PC
Input Parameters
pc
- the preconditioner context
tol
- diagonal entries smaller than this in absolute value are considered zero
Options Database Key
-pc_factor_nonzeros_along_diagonal <tol>
-
See Also
PCFactorSetFill
(), PCFactorSetShiftNonzero(),
PCFactorSetZeroPivot
(),
MatReorderForNonzeroDiagonal
()
Level
intermediate
Location
src/ksp/pc/impls/factor/factor.c
Implementations
PCFactorReorderForNonzeroDiagonal_ILU in src/ksp/pc/impls/factor/ilu/ilu.c
PCFactorReorderForNonzeroDiagonal_LU in src/ksp/pc/impls/factor/lu/lu.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages