[petsc-users] How to set L1 norm as the converge test?

[Brian Yang]

Hi all,

For example, I am using LSQR or CG to solve Ax=b.

When we turn on the monitor option of solving the linear system, we could
see iteration number and residual for each iteration. I believe it's L2
norm of the objective function?

If yes, is there a way that I could set it to L1 norm for solving the
system?

Thanks.

-- 
Brian Yang
U of Houston
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