Hi Simon,
Thanks. The new version compiled without any problems. So back
to looking at these groups with really powerful tools. Jon,
Alex and I did a lot of these calculations by hand some 15 years
back, including most of the analysis needed for M_{24} mod 2.
But determining the invariant subrings of the cohomology of
the various key elementary 2-groups was beyond us then.
Thanks again. From your description it sounds like you had
to make some major changes to get it to work with the current
version of sage.
Jim
On Thu, 9 Feb 2012, Simon King wrote:
Hi Jim and all others interested in group cohomology!
On 4 Feb., 17:27, Jim Milgram <milg...@math.stanford.edu> wrote:
Using openSUSE 12.1. Sage compliled without difficulty, but
the compilation of the optional program "p_group_cohomolgy" failed.
I solved the problems:
- After upgrading the Cython version in Sage, some constructions that
version 2.0 of my spkg is using became illegal.
- After upgrading of the Singular version in Sage, some commands
changed, so that I had to rewrite a couple of Singular related lines
in my code.
- I shot myself into the foot Some of my changes concerning
categories and coercion in Sage created an incompatibility with the
group cohomology spkg.
So, three independent problems. The new version 2.1.2 should solve it
- for me, all tests pass. You can install it with
sage -i
http://sage.math.washington.edu/home/SimonKing/Cohomology/p_group_cohomology-2.1.2.spkg
Please inform me if you meet problems!
The documentation is available at
http://sage.math.washington.edu/home/SimonKing/Cohomology/
Remark:
There is a ticket #9894 for upgrading the group cohomology spkg. Since
the version 2.1.1 discussed there would not work with recent versions
of Sage, I hope it is ok that I promote the ticket to version 2.1.2 -
which should work.
Best regards,
Simon
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