On 7/19/19 9:47 AM, 'Maxi Miller' via deal.II User Group wrote:
> What I did was the replacement of system_matrix with a function, providing a
> vmult()-function. Now I would like to add a preconditioner based on that
> function to reduce the necessary GMRES-iterations. But until now most of the
> preconditioners require a matrix for initialization. Thus I wanted to replace
> that matrix with my LinearOperator, if that is possible?
Yes, as I already said, this is possible. Have you tried?
I think you should also be able to look at step-20 (and maybe 22) for examples.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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