KSPPIPEGCRGetTruncationType

get the truncation strategy employed by KSPPIPEGCR

Synopsis

#include "petscksp.h"  
PetscErrorCode KSPPIPEGCRGetTruncationType(KSP ksp, KSPFCDTruncationType *truncstrat)

Not Collective

Input Parameter

• ksp - the Krylov space context

Output Parameter

• truncstrat - the strategy type

  KSP_FCD_TRUNC_TYPE_STANDARD uses all (up to mmax) stored directions
  KSP_FCD_TRUNC_TYPE_NOTAY uses the last max(1,mod(i,mmax)) directions at iteration i=0,1,..

See Also

KSP: Linear System Solvers, KSPPIPEGCR, KSPPIPEGCRSetTruncationType, KSPPIPEGCRTruncationType, KSPFCDTruncationType, KSP_FCD_TRUNC_TYPE_STANDARD, KSP_FCD_TRUNC_TYPE_NOTAY

Level

intermediate

Location

src/ksp/ksp/impls/gcr/pipegcr/pipegcr.c

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Index of all KSP routines
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