On 1/14/08, Pierre <[EMAIL PROTECTED]> wrote: > > It may be appropriate to quote some other existing results on the > subject. There are mostly two sources of computations of cohomology > rings (not just in low degrees): > > *** Jon Carlson's page: > > http://www.math.uga.edu/~lvalero/cohointro.html > > He computes the cohomology rings, as well as a wealth of relevant > information about them, for all the groups of order dividing 64 (not a > single group is missing). His programs are in Magma, and have > benefited from specific tweaking from the team that developped Magma. > > *** David Green's page: > > http://www.math.uni-wuppertal.de/~green/Coho_v2/ > (there are a couple of other locations or mirrors) > > Here you'll find some computations at odd primes as well as at 2, and > some computations for very large groups (256 for example). The > programs are in C. You'll be interested to know that David and one co- > author whose name escapes me are currently re-writing the whole thing > with SAGE. Normally a user-friendly interface should come with it. > > You might find my own computations relevant (under construction): > > http://www-irma.u-strasbg.fr/~guillot/research/cohomology_of_groups/index.html > > I have added information on Stiefel-Whitney classes and Steenrod > operations. Most of the computations were in C++ but SAGE has also > been crucially used (how else could you call GAP, mathematically > process the information, download stuff from Carlson's page, call the C > ++ programs, and then produce the HTML files, all in one language ?)
I've added a link for this cool project here: http://sagemath.org/pub.html Let me know if you want me to change anything. Perhaps you'll want to make all the data available as a database as part of Sage at some point? William --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-forum URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~----------~----~----~----~------~----~------~--~---
