[petsc-users] MatCreateTranspose

[Carl-Johan Thore]

On Tue, Apr 9, 2024 at 5:31 PM Pierre Jolivet <pierre at joliv.et> wrote:

>
> On 9 Apr 2024, at 4:19 PM, Carl-Johan Thore <carljohanthore at gmail.com>
> wrote:
>
> This Message Is From an External Sender
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> Thanks for the suggestion. I don't have a factored matrix (and can't
> really use direct linear solvers) so MatSolveTranspose doesn't seem to be
> an option.
> I should have mentioned that I've also tried KSPSolveTranspose but that
> doesn't work with pcredistribute
>
>
> I’m not a frequent PCREDISTRIBUTE user, but it looks like
> https://urldefense.us/v3/__https://petsc.org/release/src/ksp/pc/impls/redistribute/redistribute.c.html*line332__;Iw!!G_uCfscf7eWS!cgAsxyEH_bcrB52QRg6oG5BdTF8bLQr9pb71JxdsoP7FOO0BCi8XGqL6D3oXT9GrnsuqWfA8MuLi8xxWvmzAKeSxmS6R2g$  could
> be copy/paste’d into PCApplyTranspose_Redistribute() by just changing a
> MatMult() to MatMultTranspose() and KSPSolve() to KSPSolveTranspose().
> Would you be willing to contribute (and test) this?
> Then, KSPSolveTranspose() — which should be the function you call — will
> work.
>
> Thanks,
> Pierre
>

Thanks, that sounds promising. Yes, I'll try to make a contribution
/Carl-Johan
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