SNESQNSetRestartType#

Sets the restart type for SNESQN.

Synopsis#

#include "petscsnes.h" 
PetscErrorCode SNESQNSetRestartType(SNES snes, SNESQNRestartType rtype)

Logically Collective

Input Parameters#

snes - the iterative context
rtype - restart type

Options Database Keys#

-snes_qn_restart_type <powell,periodic,none> - set the restart type
-snes_qn_m - sets the number of stored updates and the restart period for periodic

`SNESQNRestartType`s#

SNES_QN_RESTART_NONE - never restart
SNES_QN_RESTART_POWELL - restart based upon descent criteria
SNES_QN_RESTART_PERIODIC - restart after a fixed number of iterations

See Also#

SNESQN, SNESQNRestartType, SNES_QN_RESTART_NONE, SNES_QN_RESTART_POWELL, SNES_QN_RESTART_PERIODIC

Level#

intermediate

Location#

src/snes/impls/qn/qn.c

Implementations#

SNESQNSetRestartType_QN in src/snes/impls/qn/qn.c

Index of all SNES routines
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Index of all manual pages