On Jun 24, 9:54 am, Ronan Lamy <[email protected]> wrote: > > For example, complex infinity is a correct value for 1/sin(x) at x = 0 > > because the limit could be -infinity or +infinity depending on the > > direction of the limit along the real line, or it could be an infinity > > with any complex phase when approached through the complex plane. > > > On the other hand log(0) = -infinity because log(x) tends to -infinity > > no matter the direction of approach. > > > Fredrik > > No, log(0) has to be ComplexInfinity.
Wolfram says that log(0) = -infinity. > Otherwise, limit(1/exp(log(-x), x, > 0, "+") = +infinity ! Check this link: http://www53.wolframalpha.com/input/?i=+limit+(1%2Fexp(log(-x))+as+x-%3E0%2B ~Luke --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
