#12708: limit not correctly computed by maxima
--------------------------------------------------------------+-------------
Reporter: ppurka | Owner:
burcin
Type: defect | Status:
needs_review
Priority: critical | Milestone:
sage-5.9
Component: calculus | Resolution:
Keywords: | Work issues:
Report Upstream: Fixed upstream, in a later stable release. | Reviewers:
Authors: Punarbasu Purkayastha | Merged in:
Dependencies: | Stopgaps:
--------------------------------------------------------------+-------------
Changes (by {'newvalue': u'Punarbasu Purkayastha', 'oldvalue': ''}):
* status: needs_work => needs_review
* author: => Punarbasu Purkayastha
* milestone: sage-duplicate/invalid/wontfix => sage-5.9
* keywords: maxima limit =>
* reviewer: Punarbasu Purkayastha =>
Old description:
> This is taken from the google notebook bug report page.
> {{{
> sage: limit(tanh(x),x=0)
> x
> }}}
> On the other hand, this works
> {{{
> sage: limit(tanh(x),x=0,taylor=True)
> 0
> }}}
> It is a bug in Maxima, and is still present in sage-5.0beta8. This beta
> apparently has maxima-5.26, the latest released version of Maxima.
>
> ----
>
> Update: It has been fixed upstream. It is in maxima-5.27
New description:
This is taken from the google notebook bug report page.
{{{
sage: limit(tanh(x),x=0)
x
}}}
On the other hand, this works
{{{
sage: limit(tanh(x),x=0,taylor=True)
0
}}}
It is a bug in Maxima, and is still present in sage-5.0beta8. This beta
apparently has maxima-5.26, the latest released version of Maxima.
----
Update: It has been fixed upstream. It is in maxima-5.27
----
Patch attached with doctest.
Apply [attachment:trac_12708-doctest_limit.patch]
--
Comment:
This should be doctested in maxima, IMHO :/
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12708#comment:10>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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