SNESComputeMFFunction#
Calls the function that has been set with DMSNESSetMFFunction().
Synopsis#
#include "petscsnes.h"
PetscErrorCode SNESComputeMFFunction(SNES snes, Vec x, Vec y)
Collective
Input Parameters#
snes - the
SNEScontextx - input vector
Output Parameter#
y - output vector
Notes#
SNESComputeMFFunction() is used within the matrix-vector products called by the matrix created with MatCreateSNESMF()
so users would not generally call this routine themselves.
Since this function is intended for use with finite differencing it does not subtract the right-hand side vector provided with SNESSolve()
while SNESComputeFunction() does. As such, this routine cannot be used with MatMFFDSetBase() with a provided F function value even if it applies the
same function as SNESComputeFunction() if a SNESSolve() right-hand side vector is use because the two functions difference would include this right hand side function.
See Also#
SNES: Nonlinear Solvers, SNES, SNESSetFunction(), SNESGetFunction(), SNESComputeFunction(), MatCreateSNESMF(), DMSNESSetMFFunction()
Level#
developer
Location#
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages