Hi,
I found another error limit :
If x = symbols('x', positive=True), limit(tan(abs(x))/acosh(x), x, pi/2,
'-') returns oo --> OK
If x = symbols('x', real=True), limit(tan(abs(x))/acosh(x), x, pi/2, '-')
returns oo*sign(1/Subs(Derivative(re(_x), _x), (_x,), (0,))) !!
I guess the first result is correct because sympy can evaluate abs(x) to x
for x positive, but for x real it can't simplify the function and calculate
the limit !
Le samedi 7 février 2015 05:08:05 UTC+1, Ondřej Čertík a écrit :
>
> The limits will have to be debugged, essentially we just need to go
> step by step and see which routine returns the wrong answer.
>
> Ondrej
>
> On Fri, Feb 6, 2015 at 8:11 PM, Aaron Meurer <[email protected]
> <javascript:>> wrote:
> > Be sure to test against SymPy master. As Ondrej pointed out, this used
> to
> > work, but it got broken.
> >
> > Aaron Meurer
> >
> > On Fri, Feb 6, 2015 at 5:55 PM, Douglas Lohmann <[email protected]
> <javascript:>> wrote:
> >>
> >> In my test it's not a bug. You can explain better?
> >>
> >> In [9]: limit(abs(log(x)), x, 0, '+')
> >> Out[9]: oo
> >>
> >> It was already reported the bug to the bug list?
> >>
> >> Em sábado, 31 de janeiro de 2015 13:33:40 UTC-2, Arnaud Usciati
> escreveu:
> >>>
> >>> Hello,
> >>>
> >>> limit(abs(log(x)), x, 0, '+') should return +oo, but it returns
> >>> -oo*sign(log(_w)) !!!
> >>>
> >>>
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