Try asking Bosman directly; I don't know if he reads this list. John
On 27 February 2013 15:23, Peng <tianpeng.ch...@gmail.com> wrote: > Dear John Cremona, > Thanks for your reply. > > For n=45000 or smaller, it works well and gives an output. Then the next > number I tried is 50000 and this gave an Error. > > In sage 5.7, this doesn't work neither. > > I even don't know yet why this happens exactly. > > PS: > I'm trying to compute the modular Galois represtations of Ramanujan tau > function using the algorithm by Johan Bosman, which requests a huge > precision for q-expansion of modular forms used inside the code. Actually, > this error happens when I ran Bosman's code and sage indicates that > HeilbronnMere went wrong in this case. > > > > On Wednesday, February 27, 2013 2:26:55 PM UTC+1, John Cremona wrote: >> >> I cannot think of a reason for computing Heilbronn matrices of such >> large index, so you have one? And how does it perform for smaller n, >> say 1000, 10000, 20000, ...? >> >> Lastly, Sage-5.7 has been released so you should upgrade (but I am not >> saying if any relevant code has changed between 5.4.1 and 5.7, as I >> have not checked). >> >> John >> >> On 27 February 2013 11:32, Peng <tianpen...@gmail.com> wrote: >> > Dear all, >> > >> > I've tried to compute Heilbronn Matrices for n=50000 in sage 5.4.1, but >> > the >> > following Error comes out when I run >> > >> > sage: H=HeilbronnMerel(50000) >> > >> > -------------------------------------------------------------------- >> > >> > RuntimeError Traceback (most recent call last) >> > >> > /home/guests/sage-5.4.1/<ipython console=""> in <module>() >> > >> > >> > /home/guests/sage-5.4.1/local/lib/python2.7/site-packages/sage/modular/modsym/heilbronn.so >> > in sage.modular.modsym.heilbronn.HeilbronnMerel.__init__ >> > (sage/modular/modsym/heilbronn.c:5185)() >> > >> > >> > /home/guests/sage-5.4.1/local/lib/python2.7/site-packages/sage/modular/modsym/heilbronn.so >> > in sage.modular.modsym.heilbronn.HeilbronnMerel._initialize_list >> > (sage/modular/modsym/heilbronn.c:5343)() >> > >> > RuntimeError: Floating point exception >> > >> > -------------------------------------------------------------------- >> > >> > It seems to be a bug in sage when computing Heilbronn Matrices for large >> > n. >> > However, I even couldn't find out why this happens. Anybody can please >> > help >> > me handle with that? Thank you. >> > >> > >> > Best regards! >> > >> > -- >> > You received this message because you are subscribed to the Google >> > Groups >> > "sage-devel" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> > an >> > email to sage-devel+...@googlegroups.com. >> > To post to this group, send email to sage-...@googlegroups.com. >> > Visit this group at http://groups.google.com/group/sage-devel?hl=en. >> > For more options, visit https://groups.google.com/groups/opt_out. >> > >> > > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To post to this group, send email to sage-devel@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-devel?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
