[Trilinos-Users] Assembling inverses of submatrices

[Karim Khayrat]

I was wondering what is the best approach in Trilinos to take the following
problem.

Given a matrix A, I want to extract submatrices, invert them and reassemble
them. This is very similar to what is done to obtain the schwarz
preconditioner
(see https://trilinos.org/oldsite/packages/ifpack/IfpackUserGuide.pdf
equation 17). However I want to specify the subdomains myself since I will
generally have much more subdomains than processors.

Thanks!
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