SNESGetNPC#

Gets a nonlinear preconditioning solver SNES` to be used to precondition the original nonlinear solver.

Synopsis#

#include "petscsnes.h"  
PetscErrorCode SNESGetNPC(SNES snes, SNES *pc)

Not Collective; but any changes to the obtained the npc object must be applied collectively

Input Parameter#

  • snes - iterative context obtained from SNESCreate()

Output Parameter#

  • pc - preconditioner context

Options Database Key#

  • -npc_snes_type - set the type of the SNES to use as the nonlinear preconditioner

Notes#

If a SNES was previously set with SNESSetNPC() then that value is returned, otherwise a new SNES object is created.

The (preconditioner) SNES returned automatically inherits the same nonlinear function and Jacobian supplied to the original SNES

See Also#

SNES: Nonlinear Solvers, SNESSetNPC(), SNESHasNPC(), SNES, SNESCreate()

Level#

developer

Location#

src/snes/interface/snes.c

Examples#

src/snes/tutorials/ex35.c

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