Barry Smith schrieb: > > As we have said before the BNN in PETSc is ONLY implemented for a > scalar PDE with > a null space of the constant functions. If you shove in linear > elasticity it isn't really going to work.
Do you have any suggestions to work around this drawback? Do I understand right, that this issue is problematic, if floating subdomains appear? Do I have the possibility to provide the null space from user site? Or how big would be the effort to change the nn-code to work for this problem classes? Is such a work useful at all or do you regard BNN only a rather complicated method to be done much better by other (even simpler) algorithms? Cheers, Ando -- /"\ Grassl Andreas \ / ASCII Ribbon Campaign Uni Innsbruck Institut f. Mathematik X against HTML email Technikerstr. 13 Zi 709 / \ +43 (0)512 507 6091
