I think you want the RealIntervalField. For exampe: sage: a = RIF(0,1) sage: b = RIF(.5,pi) sage: a.overlaps(b) True
see: http://www.sagemath.org/doc/reference/sage/rings/real_mpfi.html -M. Hampton On Dec 9, 8:16 am, Laurent Claessens <moky.m...@gmail.com> wrote: > Hi > > I would like to work with sets that are real intervals or combinations > of them : mainly intersection and union. > Example : > [0,1] intersection with [0.5 , pi] > > Using the Sage Reference Manual 4.1.1, I was able to do that : > > sage:A=Set(RealField()) > sage: sqrt(2) in A > True > > So it is possible to consider parts of R as sets. How can I build an > interval ? > > Have a good day > Laurent Claessens > > PS : I send this message by email on December, 4. Since I did not even > saw my message appearing, I decided to repost it from the GoogleGroup > online interface. I'm wrong in doing that ? -- 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
