Hi everyone, I am using petsc to solve a system AX=B. I use the classical user approach with a KSP context. In particular I use a LU factorization once (using the external package MUMPS here, but it could be something else) and then use KSP solve to solve for multiple different right hand sides.
However in my problem, I am only interested in a few elements (Let's say as an example only the first 10 elements out of 100000) of the solution vector. Is there a way in petsc to ask to only retrieve the first few elements of the solution vector, or do I have to perform the full vector calculation and then "manually" retrieve the elements I want ? Thank you for your help, Tibo
