PCQR#
Uses a direct solver, based on QR factorization, as a preconditioner
Notes#
This is usually used as a preconditioner for KSPLSQR
If the matrix used to construct the preconditioner is a MATNORMAL
or MATNORMALHERMITIAN
matrix, then the QR is performed on the
inner matrix to provide the preconditioner.
See Also#
KSP: Linear System Solvers, PCCreate()
, PCSetType()
, PCType
, PC
, PCSVD
,
PCILU
, PCLU
, PCCHOLESKY
, PCICC
, PCFactorSetReuseOrdering()
, PCFactorSetReuseFill()
, PCFactorGetMatrix()
,
PCFactorSetFill()
, PCFactorSetUseInPlace()
, PCFactorSetMatOrderingType()
, PCFactorSetColumnPivot()
,
PCFactorSetPivotingInBlocks()
, PCFactorSetShiftType()
, PCFactorSetShiftAmount()
PCFactorReorderForNonzeroDiagonal()
, KSPLSQR
Level#
beginner
Location#
src/ksp/pc/impls/factor/qr/qr.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages