From: Osni Marques
Date: Tue, 26 Aug 2014 09:01:51 -0700
I see my name in the original message but don't recall seeing it before,
sorry. In any case, I have reproduced the bug. The problem is in the
computation of the roots of a secular equation in subroutine dlaed6.f,
and I am a bit suspicious of the test 'IF ( ( DSCALE( I )-TAU ).NE.ZERO
) THEN' there. I will have to discuss with other folks around though.
Hi LAPACK developers,
I reported this issue about dsyevd failing to converge on the attached matrix
in the LAPACK forum about a year ago, but I think it still has not been
addressed. The original posting is here:
Can you take another look at this problem? Thanks.
From: Duncan Po
Sent: Wednesday, November 27, 2013 10:43 AM
To: Langou, Julien
Subject: RE: http://icl.utk.edu/lapack-forum/viewtopic.php?f=13&t=4391
Attached is the reproduction program and test matrix. The returned INFO is
15529 on my machine.
Previously I have reported this issue to the Intel MKL team. I am not sure if
they have already filed the same problem report to you.
Happy Thanksgiving to you too!