On Tue, May 9, 2023 at 4:15 AM Stephan Köhler <
stephan.koeh...@math.tu-freiberg.de> wrote:
> Dear PETSc/Tao team,
>
> it seems to be that there is a bug in the LMVM matrix class:
>
> The function MatMultAdd_LMVM, see, e.g.,
> https://petsc.org/release/src/ksp/ksp/utils/lmvm/lmvmimpl.c.html at
Dear PETSc/Tao team,
it seems to be that there is a bug in the LMVM matrix class:
The function MatMultAdd_LMVM, see, e.g.,
https://petsc.org/release/src/ksp/ksp/utils/lmvm/lmvmimpl.c.html at line
114, if the vectors Y and Z are the same, then the result is wrong,
since the first MatMult
Thanks for the bug report with reproducing example. I have a fix in
https://gitlab.com/petsc/petsc/-/merge_requests/5797
Barry
> On Nov 2, 2022, at 6:52 AM, Stephan Köhler
> wrote:
>
> Dear PETSc/Tao team,
>
> it seems to be that there is a bug in the LMVM matrix class:
>
> In the
Dear PETSc/Tao team,
it seems to be that there is a bug in the LMVM matrix class:
In the function MatCreateVecs_LMVM, see, e.g.,
https://petsc.org/release/src/ksp/ksp/utils/lmvm/lmvmimpl.c.html at line
214.
it is not checked if the vectors *L, or *R are NULL. This is, in
particular, a
