> what is clear is that your "A" is indefinite, so GMRES or common > iterative solvers can not works.
That's not true, of course: GMRES works just fine for indefinite systems,
as do many other iterative solvers. However, CG does not work with
indefinite systems.
W.
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Wolfgang Bangerth email: [EMAIL PROTECTED]
www: http://www.math.tamu.edu/~bangerth/
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