SNESNCGType#

the conjugate update approach for SNESNCG

Values#

  • SNES_NCG_FR - Fletcher-Reeves update

  • SNES_NCG_PRP - Polak-Ribiere-Polyak update, the default and the only one that tolerates generalized search directions

  • SNES_NCG_HS - Hestenes-Steifel update

  • SNES_NCG_DY - Dai-Yuan update

  • SNES_NCG_CD - Conjugate Descent update

Options Database Key#

  • -snes_ncg_type<fr,prp,hs,dy,cd> - select type

See Also#

SNES, SNESNCG, SNESNCGSetType()`

Level#

intermediate

Location#

include/petscsnes.h

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