SNESQNRestartType#

the restart approached used by SNESQN

Values#

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

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

See Also#

SNES, SNESQN, SNESQNSetScaleType(), SNESQNType, SNESQNSetType(), SNESQNSetRestartType(), SNESQNScaleType`

Level#

intermediate

Location#

include/petscsnes.h

Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages