petsc-3.7.7 2017-09-25
Report Typos and Errors

SNESNCGSetType

 Sets the conjugate update type for SNESNCG.

Synopsis

#include "petscsnes.h" 
PetscErrorCode SNESNCGSetType(SNES snes, SNESNCGType btype)
Logically Collective on SNES

Input Parameters

snes - the iterative context
btype - update type

Options Database

-snes_ncg_type<prp,fr,hs,dy,cd> -

SNESNCGSelectTypes

SNES_NCG_FR - Fletcher-Reeves update
SNES_NCG_PRP - Polak-Ribiere-Polyak update
SNES_NCG_HS - Hestenes-Steifel update
SNES_NCG_DY - Dai-Yuan update
SNES_NCG_CD - Conjugate Descent update

Notes

PRP is the default, and the only one that tolerates generalized search directions.

Keywords

SNES, SNESNCG, selection, type, set

Level:intermediate
Location:src/snes/impls/ncg/snesncg.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages