petsc-3.7.7 2017-09-25
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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
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages