[petsc-users] PCs and MATIS

Eric Chamberland Eric.Chamberland at giref.ulaval.ca
Tue Dec 14 14:37:10 CST 2021


We want to use an Additive Schwarz preconditioner (like PCASM) combined 
with overlapping meshes *and* specific boundary conditions to local 
(MATIS) matrices.

At first sight, MATIS is only supported for BDDC and FETI-DP and is not 
working with PCASM.

Do we have to write a new PC from scratch to combine the use of mesh 
overlap, MATIS and customized local matrices?

...or is there any working example we should look at to start from? :)

Thanks a lot!


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

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