SNESNGMRESSetSelectType#

Sets the selection type for SNESNGMRES. This determines how the candidate solution and combined solution are used to create the next iterate.

Synopsis#

#include "petscsnes.h" 
PetscErrorCode SNESNGMRESSetSelectType(SNES snes, SNESNGMRESSelectType stype)

Logically Collective

Input Parameters#

  • snes - the iterative context

  • stype - selection type

Options Database Key#

  • -snes_ngmres_select_type<difference,none,linesearch> - select type

SNESNGMRESSelectTypes#

  • SNES_NGMRES_SELECT_NONE - choose the combined solution all the time

  • SNES_NGMRES_SELECT_DIFFERENCE - choose based upon the selection criteria

  • SNES_NGMRES_SELECT_LINESEARCH - choose based upon line search combination

Note#

The default line search used is the SNESLINESEARCHL2 line search and it requires two additional function evaluations.

See Also#

SNESNGMRESSelectType(), SNES_NGMRES_SELECT_NONE, SNES_NGMRES_SELECT_DIFFERENCE, SNES_NGMRES_SELECT_LINESEARCH

Level#

intermediate

Location#

src/snes/impls/ngmres/snesngmres.c

Implementations#

SNESNGMRESSetSelectType_NGMRES in src/snes/impls/ngmres/snesngmres.c

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