ASKSAGE: Sage Q&A Forum - Latest question feedhttp://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Wed, 23 Nov 2016 14:13:05 -0600Evaluating characters of linear algebraic grouphttp://ask.sagemath.org/question/35703/evaluating-characters-of-linear-algebraic-group/ How would I evaluate the characters on $SL_2(\mathbb{F}_q)$ on some conjugacy class (which I know one element of). I think I will have to use the port to GAP, as constructing characters of non-permutation groups doesn't seem to implemented. I could construct the character table, but that is maybe inefficient.vukovWed, 23 Nov 2016 14:13:05 -0600http://ask.sagemath.org/question/35703/Order of symmetric group irrepshttp://ask.sagemath.org/question/35299/order-of-symmetric-group-irreps/ This is a key detail for me, but I can't find any information about it in the Sage or GAP documentation: if I use
SymmetricGroup(5).character_table()
I get a 7x7 matrix, with rows indexed by conjugacy classes and columns indexed by irreps. Both of these things can be indexed, for instance, by Young diagrams of size 5.
How are the rows and columns ordered? Is it safe to assume that they will be ordered in reverse-lexicographic order on the Young diagrams, i.e.
5 ; 4,1 ; 3,2 ; 3,1,1 ; 2,2,1 ; 2,1,1,1 ; 1,1,1,1,1
This seems to be the case in the examples I've checked but I want to be sure that this is guaranteed by the code and not a coincidence in small examples.xanderfloodFri, 28 Oct 2016 18:52:33 -0500http://ask.sagemath.org/question/35299/How do I create the character table of the group of units mod n ?http://ask.sagemath.org/question/30501/how-do-i-create-the-character-table-of-the-group-of-units-mod-n/I expected a character table from
g=Zmod(5).unit_group()
g.character_table()
instead I got an error message ending with
AttributeError: 'AbelianGroupWithValues_class_with_category' object has no attribute 'character_table'
How do I create the character table of the group of units mod n ?nilo de roockFri, 06 Nov 2015 03:18:17 -0600http://ask.sagemath.org/question/30501/5.12 command line startup looks oddhttp://ask.sagemath.org/question/10635/512-command-line-startup-looks-odd/Hi --
I successfully built 5.12 on both my laptops last night (one is Slackware Linux 14.0 and the other is Slackware Linux -current). However, when I fire up Sage, what used to be a simple ascii box (hyphens etc) around the words
Sage Version 5.12, Release Date: 2013-10-07
Type "notebook()" for the browser-based notebook interface.
Type "help()" for help.
is now an ugly rectangle of 'sorry, I can't display this correctly' glyphs in my terminal.
I tried attaching a screen shot in case my words didn't suffice, but one apparently needs karma > 60 to do so.
As far as I can tell, this isn't affecting anything else (though I can't be sure it won't) so stands as more of annoyance ... but it sure is icky looking, and I'd love to know how to fix it.
Thanks,
GlennchexmixSun, 20 Oct 2013 03:02:06 -0500http://ask.sagemath.org/question/10635/