Is it then possible to use this LinearOperator in a preconditioner? The
code works without one (i.e. PreconditionIdentity()), but the Iterations
are increasing quite fast, thus negating all speedup gained from the
LinearOperator.
I tried to find something in the examples, but only found data about using
matrices as input for preconditioners, not pure LinearOperators containing
only a vmult-function.
Am Dienstag, 16. Juli 2019 18:21:28 UTC+2 schrieb Matthias Maier:
>
> A short comment:
>
> On Tue, Jul 16, 2019, at 11:18 CDT, Matthias Maier <tam...@43-1.org
> <javascript:>> wrote:
>
> > struct LeftVector {
> > };
>
> > struct RightVector {
> > };
>
> These two classes are of course just decoration (showing the minimal
> interface a vector has to possess). There is usually no need to define
> custom Vector clases.
>
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