Alright, thanks David. On Tuesday, June 26, 2012 10:54:45 AM UTC+2, David Loeffler wrote: > > On 26 June 2012 08:39, winter <restom.na...@gmail.com> wrote: > > Hi, > > > > I'm trying to run the following on the online sagenb server > > (http://www.sagenb.org): > > > > f = ModularForms(Gamma1(5),2).0 > > f*f > > > > I am getting an error: > > > [...] > > > > Am I doing something wrong? > > > > > No, Sage is doing something wrong. The code for multiplying two > modular forms is *supposed* to check whether the forms have a > well-defined character, and if so create the product form as an > element of a space with character (because such spaces are much > smaller and thus quicker to compute). But the code that does this > seems to have got broken over the years, and the test suite for this > function (which should have caught the problem) is poorly designed and > thus didn't detect this case. (This is almost certainly my fault: I > think I wrote both the multiplication code, and the change elsewhere > that broke it!) > > I've opened a ticket on the Sage trac server: > > http://trac.sagemath.org/sage_trac/ticket/13165 > > Regards, David > > > > -- > > To post to this group, send email to sage-support@googlegroups.com > > To unsubscribe from this group, send email to > > sage-support+unsubscr...@googlegroups.com > > For more options, visit this group at > > http://groups.google.com/group/sage-support > > URL: http://www.sagemath.org >
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