Hi,
What would you guys think about using some additional control over the
iterative solvers. I've thought about:
- Matrix-vector product policy : can be useful for "matrix-free"
implementations.
- Custom stopping criterion
- For CG, a policy for "what to do when the matrix is found to be
indefinite (pAp < 0)
I've had to reimplement CG for this reason (for nonlinear truncated newton
methods), and some others users might have had to reimplement them too in
some other context.
Can you think about any other functors one could pass for other solvers
such as GMRES (for which I have no knowledge)?
Philippe
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