Re: [sage-devel] help with QQbar conversion to complex number

2014-11-24 Thread Ben Hutz
hmm...one more question here then I'll stop, as this is turning into more like a sage-support discussion as opposed to sage-devel. This does seem to be doing a good job with high enough precision specified. What is the best way to compare two such interval numbers? The multipliers (after applyi

Re: [sage-devel] help with QQbar conversion to complex number

2014-11-24 Thread Jonas Jermann
Hi In particular: Try .simplify()! In my case that produced an improvement factor >1000 in some cases. Best Jonas On 24.11.2014 20:54, Ben Hutz wrote: Thanks Vincent. I can give that a try. We did try to approximate earlier with CC and the errors were compounding too much (we do a bunch m

Re: [sage-devel] help with QQbar conversion to complex number

2014-11-24 Thread Ben Hutz
Thanks Vincent. I can give that a try. We did try to approximate earlier with CC and the errors were compounding too much (we do a bunch more stuff after this), but maybe approximating the roots with CIF will do a better job. It sounds like the recursion depth error is actually expected for num

Re: [sage-devel] help with QQbar conversion to complex number

2014-11-24 Thread Vincent Delecroix
Hi Ben, You are dealing with complicated numbers, it is not surprising that things like "exactify" or "__cmp__" lead to maximum recursion errors. If you want something faster than QQbar you can either: - do approximation earlier in the code - try to work with number fields Note that your exampl