SNESPicardComputeMFFunction

Matrix-free residual \(A(x) x - b(x)\) used by SNESSetPicard() when the operator is applied through -snes_mf_operator

Synopsis

#include "petscsnes.h"  
#include "petscsnes.h"  
PetscErrorCode SNESPicardComputeMFFunction(SNES snes, Vec x, Vec f, PetscCtx ctx)

Collective

Input Parameters

• snes - the SNES context

• x - the current iterate

• ctx - unused application context; the Picard callbacks are retrieved from the attached DMSNES

Output Parameter

• f - the residual vector

Note

Uses a duplicate of snes->jacobian_pre because snes->jacobian_pre cannot be changed during the KSPSolve().

See Also

SNES: Nonlinear Solvers, SNES, SNESSetPicard(), SNESPicardComputeFunction(), SNESPicardComputeJacobian()

Level

developer

Location

src/snes/interface/snes.c

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Index of all SNES routines
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