On Tue, Nov 1, 2011 at 14:06, Jose E. Roman <[email protected]> wrote:

>
> El 01/11/2011, a las 20:55, Roy Stogner escribió:
>
> >
> > On Tue, 1 Nov 2011, Jed Brown wrote:
> >
> >> Kyunghoon, the error messages say petsc-3.1p8, but the configure line
> makes it look like you are trying to use petsc-3.2. Which
> >> is it? I assume that Roy reproduced with a clean petsc-3.2/slepc-3.2
> configuration.
> >
> > Actually, no - I just built against the newest versions we had lying
> > around: petsc-3.1-p5 and slepc-3.1-p4.  I'd be happy to upgrade and
> > test the latest if it'd be helpful with any bug hunting, though.
> > ---
> > Roy
>
>
> The error "IPNorm: The inner product is not well defined!" is usually due
> to the fact that the B matrix of the eigenproblem is not positive (semi)
> definite. Are you sure your eigenproblem is definite? In that case, I would
> be interested in trying these matrices to track down the problem.
>

It is supposed to be a finite element generalized eigenproblem where A is
the Laplacian and B is a mass matrix (using Q_1 quadrilateral elements on
[-1,1]^2).
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