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Created by James Willenbring@jmwilleMaintainer

Belos: Add condition number estimation to GMRES

Created by: mhoemmen

@trilinos/belos

@drnoble requests that we add condition number estimation to GMRES.

Motivation and Context

@drnoble wants this feature for scaling studies. CG already has this feature (thanks to @csiefer2 :-) ). AztecOO's GMRES does too.

Possible Solution

It may be possible to do this with a custom StatusTest. The StatusTest would have access to the iteration object, which in turn has access to GMRES' upper Hessenberg matrix (actually matrices, since we're talking about Belos::PseudoBlockGmresIter).