[petsc-users] Using MatCreateComposite with petsc4py

[Eric Chamberland]

Hello,

We were exploring the use of the |MatCreateComposite| function with 
|petsc4py|, but we noticed that it doesn't seem to be available in the 
Python interface 
(https://urldefense.us/v3/__https://petsc.org/release/petsc4py/reference/petsc4py.PETSc.Mat.html__;!!G_uCfscf7eWS!fphemsDPNmxHUr-ybYLt_xWUrP575eKuI4xixwypEzd2g7uc6qMilt8etg13o24gU0vloOVrsHDXwqlgoY1T7jrcQUiv83PrXvNSYlNU$ ).

We were wondering if this is due to a technical limitation or if there 
is a better alternative to achieve the same result.

Our goal is to create a matrix representing PTAP without explicitly 
computing the product.

We also considered using |MatShell|, but it seems that this approach is 
not supported in |petsc4py| either.

On the other hand, we noticed that |MatCreateTranspose| is implemented, 
and it aligns somewhat with the kind of operation we're aiming for.

Any insights or advice you could provide would be greatly appreciated!

Thank you,

Eric

-- 
Eric Chamberland, ing., M. Ing
Professionnel de recherche
GIREF/Université Laval
(418) 656-2131 poste 41 22 42
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