On 07/08/13 15:35, kcrisman wrote:


On Wednesday, August 7, 2013 12:01:49 AM UTC-4, Ed Scheinerman wrote:

    When I try this:

    sage: y = gamma(x+1/2)/gamma(x)/sqrt(x)
    sage: limit(y,x=oo)
    0
    sage: plot(y,x,1,50)

    I observe that the limit appears to be 1, not 0.


This is how it happens in Maxima.

(%i2) y:gamma(x+1/2)/(sqrt(x)*gamma(x));
                                            1
                                  gamma(x + -)
                                            2
(%o2)                          ----------------
                                sqrt(x) gamma(x)
(%i3) limit(y,x,0);
(%o3)                                  0


I've reported this at https://sourceforge.net/p/maxima/bugs/2621/ - if
someone can open a Sage ticket for this, it would be helpful, as I don't
have tons of internet time right now.



Reported in http://trac.sagemath.org/ticket/15033#ticket

#15033: Wrong limit value of expression involving gamma function


--
Jose Guzman
http://www.ist.ac.at/~jguzman/

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