Thank you for your reply.

I get:

sage: maxima.version()
'5.26.0'

I searched the Maxima change logs at:

http://code.metager.de/source/xref/maxima/ChangeLog-5.27

(and also for 5.28) and did not see any direct changes to elliptic 
functions.  
But I am glad to see that they seem to be working better in 5.28.

Is there any chance that Maxima 5.28 will be included in the next version 
of Sage ?
In February, I will be teaching a course (at AIMS in Cape Town) using Sage, 
where I plan
to introduce the elliptic functions; and it would be nice to have this 
working by then.

Thanks again! 

Rafael.

On Sunday, September 16, 2012 2:09:02 AM UTC-4, Robert Dodier wrote:
>
> On 2012-09-16, kcrisman <[email protected] <javascript:>> wrote: 
>
> > I don't have access to a Maxima instance right now - can someone try to 
> > recreate this there? 
>
> For the record, here's what I get w/ Maxima 5.28.0 (current release). 
>
> (%i1) u : 1.2 $ 
> (%i2) m : 0.5 $ 
> (%i3) jacobi_sn (u, m); 
> (%o3)                          .8877154886192781 
> (%i4) jacobi_sn (u + 2 * %i * elliptic_kc (1 - m), m); 
> (%o4)             0.88771548861928 - 1.884363664625109E-15 %i 
>
> I don't know what version of Maxima Sage is using, and I would have to 
> look at the revision log to see if the elliptic functions have changed 
> since then. 
>
> best, 
>
> Robert Dodier 
>
>

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