Is DMMGSolve in Petsc a Newton-multigrid?

[Matthew Knepley]

On Wed, Jul 22, 2009 at 3:18 PM, (Rebecca) Xuefei YUAN
<xy2102 at columbia.edu>wrote:

> Is Newton iteration for the outer iterations and multigrid for the linear
> inner iterations?


This is the usual formulation:

  Newton to solve F(u) = 0

and

  Multigrid to precondition F'(u) \delta u = -F(u)

  Matt


>
> Thanks
>
> --
> (Rebecca) Xuefei YUAN
> Department of Applied Physics and Applied Mathematics
> Columbia University
> Tel:917-399-8032
> www.columbia.edu/~xy2102 <http://www.columbia.edu/%7Exy2102>
>
-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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