oo*I is the directional infinity along the positive imaginary axis. If you want, you can think of oo as the limit of the sequence {1, 2, 3, ...} and oo*I is the limit of the sequence {1*I, 2*I, 3*I, ...}. SymPy also has zoo, or complex infinity (the north pole in the Riemann sphere). This intuitively represents infinity in every complex direction.
oo, and expressions containing it, are strictly speaking only formalisms. Operations on oo aren't always well-defined, and if you try hard enough, you can manipulate expressions containing it to obtain nonsense or even wrong results (instead of putting oo in an expression and computing with it, you should use limit()). Aaron Meurer On Fri, Oct 23, 2015 at 12:51 AM, Speed <csvina...@gmail.com> wrote: > Hello, > > I'm curious to know as to how we are treating oo here on the sympy project. > as sometimes some ans shows that oo*I is possible, how are we really > defining oo here. > > Regards, > Speed > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sympy+unsubscr...@googlegroups.com. > To post to this group, send email to sympy@googlegroups.com. > Visit this group at http://groups.google.com/group/sympy. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/0a642616-3590-4241-af76-1cfbc2a4ccc8%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6%2BqSWoFaY4hH4zkQEKD%3DuLuVtK0Y%2B5J3cWhPC2-LmFxpw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.