Thank You for answer! With best, Oleg
On Wednesday, 11 December 2019 15:56:35 UTC+1, Wolfgang Bangerth wrote: > > On 12/10/19 7:16 PM, Oleg Kmechak wrote: > > Can You describe please, why algebraic multigrid algorithm may be better > in > > this situation? Is it somehow opitmal for Laplacea equation or to my > irregular > > mesh? > > That's a long of difficult question -- there's a reason why I recorded > four > video lectures on preconditioning :-) But in short, yes, the algebraic > multigrid method is one of very few algorithms that we know is optimal for > the > Laplace equation. That is, at least, true for the cases where your problem > becomes large -- several hundred thousand or millions of unknowns. For > small > problems, a direct solver is probably faster. > > Best > W. > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: [email protected] > <javascript:> > www: http://www.math.colostate.edu/~bangerth/ > > -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/416b586e-c1ca-471f-8322-04e67a4def3e%40googlegroups.com.
