petsc-3.9.0 2018-04-07
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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> -

Keywords

PC, set, factorization, direct, fill

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