[sage-support] Re: Options for the Sage expand function

2014-06-15 Thread JBB
On 6/14/14, 7:04 PM, leif wrote: jeanbigbo...@gmail.com wrote: Excuse the top-posting, the google groups UI is not as convenient for excerpting as emacs and a good Usenet server... A couple of Sage groups (including this) are available on/through gmane.org as well (gmane.comp.mathematics.sage.

[sage-support] Re: Options for the Sage expand function

2014-06-14 Thread JBB
On 6/14/14, 6:22 PM, William Stein wrote: On Sat, Jun 14, 2014 at 6:12 PM, wrote: Dima writes: "there is nothing wrong with using a bit of pure mathematics for applied problems; e.g. cryptographers do this all the time... " Agreed. My formal education was from a time when fields, groups, and

[sage-support] Re: Options for the Sage expand function

2014-06-14 Thread JBB
On 6/14/14, 7:04 PM, leif wrote: jeanbigbo...@gmail.com wrote: Excuse the top-posting, the google groups UI is not as convenient for excerpting as emacs and a good Usenet server... A couple of Sage groups (including this) are available on/through gmane.org as well (gmane.comp.mathematics.sage.

[sage-support] Re: Options for the Sage expand function

2014-06-14 Thread leif
jeanbigbo...@gmail.com wrote: Excuse the top-posting, the google groups UI is not as convenient for excerpting as emacs and a good Usenet server... A couple of Sage groups (including this) are available on/through gmane.org as well (gmane.comp.mathematics.sage.*). -leif -- () The ASCII Rib

[sage-support] Re: Options for the Sage expand function

2014-06-14 Thread Volker Braun
If you don't need provably correct answers then just work over CDF or ComplexField with a precision that you'd like. If you want to prove something you can use CIF (floating-point complex interval arithmetic) or QQbar (exact numbers). The difference between pure mathematics and applications is

[sage-support] Re: Options for the Sage expand function

2014-06-14 Thread Dima Pasechnik
On 2014-06-14, jeanbigbo...@gmail.com wrote: > > > On Saturday, June 14, 2014 6:28:02 AM UTC-7, Volker Braun wrote: >> >> On Saturday, June 14, 2014 5:43:39 AM UTC+1, jeanbi...@gmail.com wrote: >>> >>> I'm working with quotients of complex numbers. >>> >> >> The fraction field of the complex numbe

[sage-support] Re: Options for the Sage expand function

2014-06-14 Thread jeanbigboute
On Saturday, June 14, 2014 6:28:02 AM UTC-7, Volker Braun wrote: > > On Saturday, June 14, 2014 5:43:39 AM UTC+1, jeanbi...@gmail.com wrote: >> >> I'm working with quotients of complex numbers. >> > > The fraction field of the complex numbers are the complex numbers. > > For any serious computati

[sage-support] Re: Options for the Sage expand function

2014-06-14 Thread Volker Braun
On Saturday, June 14, 2014 5:43:39 AM UTC+1, jeanbi...@gmail.com wrote: > > I'm working with quotients of complex numbers. > The fraction field of the complex numbers are the complex numbers. For any serious computation you should probably figure out the smallest field you are really working in;