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] 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/39d2d01f-9447-f17a-7bd4-d9248fed9823%40colostate.edu.
