petsc-3.7.1 2016-05-15
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SNESFASSetRestriction

Sets the function to be used to restrict the defect from level l to l-1.

Synopsis

#include "petscsnes.h"  
PetscErrorCode SNESFASSetRestriction(SNES snes, PetscInt level, Mat mat)

Input Parameters

snes - the multigrid context Many br
mat - the restriction matrix Many br
level - the level (0 is coarsest) to supply [Do not supply 0] Many br

Many br

Notes

Usually this is the same matrix used also to set the interpolation Many brfor the same level. Many br

One can pass in the interpolation matrix or its transpose; PETSc figures Many brout from the matrix size which one it is. Many br

If you do not set this, the transpose of the Mat set with SNESFASSetInterpolation() Many bris used. Many br

Keywords

FAS, MG, set, multigrid, restriction, level

See Also

SNESFASSetInterpolation(), SNESFASSetInjection()

Level:advanced
Location:
src/snes/impls/fas/fasfunc.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages