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[sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Rob Beezer Sun May 30 18:00:11 2010
On May 30, 2:46 pm, Mike Hansen <[EMAIL PROTECTED]> wrote: > I've been working on this over the next few days, cleaning up the > code, and making permutation groups act over an "arbitrary" domain. > I'll be posting these in the next few days. Mike H  thanks for your work on this! Mike O'S  that's a great wish list. I'd like to see lots of that happen. Another item on my wish list is to build a quotient group and have its elements (optionally) actually be cosets. Right now for permutation groups you get back a new permutation group: sage: D=DihedralGroup(7) sage: H=D.subgroup([D((1,2,3,4,5,6,7))]) sage: Q=D.quotient(H) sage: Q.list() [(), (1,2)] Maybe with a new "coset" class and Mike's arbitrary domains this would be easy to implement? I've brought this one up before. How do folks feel about having the named permutation groups available like graphs are? In other words, rather than each family of permutation groups being a new class, there is a single systemwide object ("groups", or "perm_groups") whose methods produce instances of permutation groups (or more generally, just groups). So for example, D=groups.DihedralGroup(7) would replace the above syntax. Advantages  namespace is less cluttered, and tabcompletion (groups.<tab>) gives precise onestop shopping for examples of specific groups. Rob  To post to this group, send an email to [EMAIL PROTECTED] To unsubscribe from this group, send an email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sagedevel URL: http://www.sagemath.org
 [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives, (continued)
 [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Rob Beezer 2010/05/20
 [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives kcrisman 2010/05/20
 [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives kcrisman 2010/05/20
 Re: [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Jason B Hill 2010/05/22
 [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Rob Beezer 2010/05/22
 [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Dima Pasechnik 2010/05/22
 [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Mike OS 2010/05/23
 Re: [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Mike Hansen 2010/05/30
 Re: [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Jason B Hill 2010/05/30
 Re: [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Robert Bradshaw 2010/05/31
 [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Rob Beezer 2010/05/30 <=
 Re: [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives Robert Bradshaw 2010/05/31
 Re: [sagedevel] Re: Fwd: [sagecombinatdevel] permutation group perspectives William Laffin 2010/05/31