Matrix-free multigrid

Hal Finkel hal.finkel at
Wed Aug 19 22:54:03 CDT 2009


I'd like to try using a matrix-free Newton method with a multigrid 
object configured with -dmmg_grid_sequence, but I don't understand how. 
Using SNES directly, I can set -snes_mf, but this does not seems to work 
with the multigrid object, and DMMGSetSNES() always allocates a matrix.

Thank you in advance,

More information about the petsc-users mailing list