Re: [sage-devel] Re: slow arithmetic in number fields

2013-03-26 Thread David Roe
> Maybe I am just stupid, but I think that it would be good for this > behaviour to be documented more clearly! After all, if I define > R=RealField(200) and mutiply elements of R together the results will > still only have 200 bits of precision. (And yes, I do know the > difference between archi

Re: [sage-devel] Re: slow arithmetic in number fields

2013-03-26 Thread John Cremona
Thanks, and yes I will try that. It still takes a few minutes (even with the +O(q^200) in place) to do what takes Magma a few seconds. John On 26 March 2013 16:38, luisfe wrote: > John, > > I think you are also hitting #10255, current polynomial multiplication code > in Sage is worse than the c