On Wed, Feb 24, 2016 at 9:45 AM, Manav Bhatia <[email protected]> wrote:
> Hi, > > I typically apply Dirichlet BCs by modifying the Jacobin and rhs: zero > constrained rows of matrix with 1.0 at diagonal, and zero corresponding > rows of rhs. > > While using GAMG, is it still recommended to provide the near-null > space (given that the zero-eigenvalues have been removed by specification > of DIrichlet BCs)? > Yes. > If that information is still needed, should the vectors be modified in > any manner to be consistent with the Dirichlet BCs? > No. You can see that if you take a small piece of the domain, apart from the boundary, it will have this as a null space. Matt > Thanks, > Manav > > > -- 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
