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

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