Dear Daniel, Thank you very much! I use code like this: constraints.distribute_local_to_global(local_matrix, local_dof_indices, system_matrix) as you say,
and use codes like this constraints.distribute(solution); after every "solve()" step. and now, my LittleCase0-3.cc can run. Maybe a question more : how to make sure your period boundary coditions are added truly? Thank you very much! Best, Chucui -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
