[petsc-users] Least Squares options in Petsc

[Mengda Wu]

Hi all,

   I am trying to solve an overdetermined system using Petsc. I am using
un-preconditioned LSQR but it seems that it converges slowly. I am woer
ndering what preconditioner may improve the convergence. Or
are there any other ksp I can use?

Thanks,
Mengda
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