On Tuesday, 24 November 2015 11:12:13 UTC, Sergey Kirpichev wrote:
>
>
> On Monday, November 23, 2015 at 3:43:02 AM UTC+3, William wrote:
>>
>> This definitely looks like a bug.  In the meantime, a workaround is to 
>> use sympy: 
>>
>
>
> This is not a maxima bug:
>
>  Maxima 5.34.1 http://maxima.sourceforge.net
> using Lisp GNU Common Lisp (GCL) GCL 2.6.12 (a.k.a. GCL)
> Distributed under the GNU Public License. See the file COPYING.
> Dedicated to the memory of William Schelter.
> The function bug_report() provides bug reporting information.
> (%i1) limit(2/5*((3/4)^m - 1)*(a0 - 1000000) + 1/5*(3*(3/4)^m + 2)*a0, m, 
> inf);
> (%o1)                               400000
>

If you first set domain to complex (and this is the setting Sage uses to 
call maxima), you get the same
error as from Sage. See 
https://groups.google.com/d/msg/sage-support/rAkql0-A6cM/8zPsNUsYCAAJ

 

>
> or git version:
> Maxima branch_5_37_base_186_gfa7cd4a http://maxima.sourceforge.net
> using Lisp CLISP 2.49 (2010-07-07)
> Distributed under the GNU Public License. See the file COPYING.
> Dedicated to the memory of William Schelter.
> The function bug_report() provides bug reporting information.
> (%i1) limit(2/5*((3/4)^m - 1)*(a0 - 1000000) + 1/5*(3*(3/4)^m + 2)*a0, m, 
> inf);
> (%o1)                               400000
>
> In fact, limit algorithm implementation in sympy is known to be
> broken.  (Hopefuly, this is fixed there:
> https://github.com/skirpichev/omg/, but this is not sympy.)
>
> At some point, presumably sympy will be uniformly better than maxima? 
>>
>
> I think that as ex-dev of sympy I have good reasons to believe that
> it's not the case..  Maxima community has less 1st year college students 
> but
> much more knowlegeable people. 
>

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