[SciPy-Dev] ERROR: test_arpack.test_hermitian_modes

[Pauli Virtanen]

On Sun, 19 Jun 2011 10:10:52 +0200, Nils Wagner wrote:
[clip]
>>> FAIL: test_arpack.test_hermitian_modes(True,
>>><gen-hermitian>, 'D', 2,
>>> 'LM', None, None, <function aslinearoperator at
>>>0x2640a28>)
[clip]
> The problem persists if I increase the prefactor to 2000. i.e.
>
> ======================================================================
> ERROR: test_arpack.test_hermitian_modes(True, <gen-hermitian>, 'F', 2,
> 'SM', None, None, <function aslinearoperator at 0xe12e60>)
> ----------------------------------------------------------------------
[clip]
> ValueError: Error in inverting M: function gmres did not converge (info
> = 60)

This is  different problem: Does the ..., <gen-hermitian>, 'D', ...
one vanish when the prefactor is 2000? If not, how large a prefactor
is large enough?