[sage-support] Re: group cohomology for two particular groups

2009-04-27 Thread simon . king
Dear Mathieu, On Apr 27, 11:31 am, Mathieu Dutour wrote: > For sage, I do not know, but why not try GAP? It has a package HAP for doing > homology computations and it might solve your problem. This was essentially the answer that David Joyner gave: Install the gap_packages-spkg (which seems to

[sage-support] Re: group cohomology for two particular groups

2009-04-27 Thread Mathieu Dutour
For sage, I do not know, but why not try GAP? It has a package HAP for doing homology computations and it might solve your problem. On Wed, Apr 8, 2009 at 8:16 PM, Ursula Whitcher wrote: > > I'd like to know H^3(G,Z) for two particular finite groups, namely L_2 > (7), also known as the Chevalley

[sage-support] Re: group cohomology for two particular groups

2009-04-09 Thread Ursula
On Apr 8, 11:16 am, Ursula Whitcher wrote: > I'd like to know H^3(G,Z) for two particular finite groups, namely L_2 > (7), also known as the Chevalley group PSL(2,F_7), and M_20, a > subgroup of the Mathieu group M_24 which is isomorphic to a semidirect > product of (Z/2Z)^4 with the alternating

[sage-support] Re: group cohomology for two particular groups

2009-04-09 Thread simon . king
Hi David, On 9 Apr., 00:42, David Joyner wrote: > sage: gap.eval('LoadPackage("hap")') > 'true' 1. In my first attempt, I forgot this line. 2. In my second attempt, this line returned 'fail'. However, it may be that my Sage installation is a little messed up. We will see. Best regards, Si

[sage-support] Re: group cohomology for two particular groups

2009-04-08 Thread David Joyner
sage: gap.eval('LoadPackage("hap")') 'true' sage: gap.eval('GroupHomology(MathieuGroup(12),2,2)') '[ 2 ]' sage: gap.eval('G:=SylowSubgroup(MathieuGroup(12),2)') 'Group([ (1,2)(3,7)(4,5)(8,11), (1,2)(3,7)(6,12)(9,10), \n (1,2)(6,9)(8,11)(10,12), (1,2)(3,7)(4,8,5,11)(6,10,12,9), \n (1,3)(2,7)(4,8)(5

[sage-support] Re: group cohomology for two particular groups

2009-04-08 Thread simon . king
Hi David, On 8 Apr., 16:33, David Joyner wrote: > > and the current version of GAP in Sage is 4.4.12. > > The 4.4.12 version is > here:http://sage.math.washington.edu/home/wdj/patches/gap_packages-4.4.12_... I have gap 4.4.12 in Sage, and I did install your version of gap_packages. However, ha

[sage-support] Re: group cohomology for two particular groups

2009-04-08 Thread David Joyner
On Wed, Apr 8, 2009 at 4:21 PM, William Stein wrote: > ... >> >> computes what you want f the hap package is loaded >> (using sage -i gap_packages* - see >> http://www.sagemath.org/packages/optional/). > > Just for the record it is impossible to install the optional Gap > packages into SAge-3.

[sage-support] Re: group cohomology for two particular groups

2009-04-08 Thread William Stein
On Wed, Apr 8, 2009 at 1:11 PM, David Joyner wrote: > > On Wed, Apr 8, 2009 at 2:16 PM, Ursula Whitcher > wrote: >> >> I'd like to know H^3(G,Z) for two particular finite groups, namely L_2 >> (7), also known as the Chevalley group PSL(2,F_7), and M_20, a >> subgroup of the Mathieu group M_24 wh

[sage-support] Re: group cohomology for two particular groups

2009-04-08 Thread David Joyner
On Wed, Apr 8, 2009 at 2:16 PM, Ursula Whitcher wrote: > > I'd like to know H^3(G,Z) for two particular finite groups, namely L_2 > (7), also known as the Chevalley group PSL(2,F_7), and M_20, a > subgroup of the Mathieu group M_24 which is isomorphic to a semidirect > product of (Z/2Z)^4 with th