petsc-3.12.5 2020-03-29
SNESGetNPC
Creates a nonlinear preconditioning solver (SNES) to be used to precondition the nonlinear solver.
Synopsis
#include "petscsnes.h"
PetscErrorCode SNESGetNPC(SNES snes, SNES *pc)
Not Collective; but any changes to the obtained SNES object must be applied collectively
Input Parameter
snes -iterative context obtained from SNESCreate()
Output Parameter
pc -preconditioner context
Options Database
-npc_snes_type <type> -set the type of the SNES to use as the nonlinear preconditioner
Notes
If a SNES was previously set with SNESSetNPC() then that SNES 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 during SNESSetUp()
See Also
SNESSetNPC(), SNESHasNPC(), SNES, SNESCreate()
Level
developer
Location
src/snes/interface/snes.c
Examples
src/snes/examples/tutorials/ex35.c.html
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages