Barry Smith <[email protected]> writes: > Should we add some option to KSP to “fix” the right hand side if it > is inconsistent?
Perhaps. > Presumably this can be done if we know the null space of A? The right and left null spaces may not match. What is a SNES line search going to do when you come out with a step that is the minimum norm solution to a singular system with an inconsistent RHS? (SNES is not going to converge to a small residual or the minimum norm solution.)
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