Hi Roland,

On 30 Nov., 14:50, Rolandb <rola...@planet.nl> wrote:
> Additional information:
>
> kbug=matrix(7,5,[[pq^i for i in xrange(5)] for pq in [0,-1,1/2, -1/2,
> -3/4, 5/3, -26/25]])
> print kbug.integer_kernel()
>
> ***   bug in ZM_lll, please report

I can not confirm the error. Both with vanilla sage-4.6.2 and with a
patched sage-4.7.2, I get

sage: kbug=matrix(7,5,[[pq^i for i in xrange(5)] for pq in [0,-1,1/2,
-1/2,
....: -3/4, 5/3, -26/25]])
sage: print kbug.integer_kernel()
Free module of degree 7 and rank 2 over Integer Ring
Echelon basis matrix:
[       203   63745045    -378508    8716820  -23284352      28917
-48828125]
[         0  265179915   -1574352   36263920  -96864768     120285
-203125000]


So, I guess we need more information on your setup: What version of
Sage (and what patches/optional packages) are you using? What CPU? Did
you build from sources or installed a compiled version (which?)?

Best regards,
Simon

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