#13221: Limit should not depend on dummy variable.
----------------------------+-----------------------------------------------
Reporter: kcrisman | Owner: burcin
Type: defect | Status: new
Priority: minor | Milestone: sage-5.4
Component: calculus | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Description changed by kcrisman:
Old description:
> See #12438 as well.
>
> Somewhere between Sage 4.4.4 and 4.8 we changed behavior - not correctly,
> I'd say.
> {{{
>
> $ Downloads/sage-4.8/sage
> ----------------------------------------------------------------------
> | Sage Version 4.8, Release Date: 2012-01-20 |
> | Type notebook() for the GUI, and license() for information. |
> ----------------------------------------------------------------------
> sage: f(x) = x^2
> sage: limit(f,x=1)
> x |--> 1
> sage: limit(f(x),x=1)
> 1
> sage:
> Exiting Sage (CPU time 0m1.15s, Wall time 0m10.57s).
> karl-dieter-crismans-powerbook-g4-15:~ karl-dietercrisman$
> Desktop/sage-4.4.4-mcbc/sage
> ----------------------------------------------------------------------
> | Sage Version 4.4.4, Release Date: 2010-06-23 |
> | Type notebook() for the GUI, and license() for information. |
> ----------------------------------------------------------------------
> Loading Sage library. Current Mercurial branch is: hackbranch
> sage: f(x) = x^2
> sage: limit(f,x=1)
> 1
> sage: limit(f(x),x=1)
> 1
> }}}
New description:
See #12438 as well.
Somewhere between Sage 4.4.4 and 4.8 we changed behavior - not correctly,
I'd say.
{{{
$ Downloads/sage-4.8/sage
----------------------------------------------------------------------
| Sage Version 4.8, Release Date: 2012-01-20 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: f(x) = x^2
sage: limit(f,x=1)
x |--> 1
sage: limit(f(x),x=1)
1
sage:
Exiting Sage (CPU time 0m1.15s, Wall time 0m10.57s).
$ Desktop/sage-4.4.4-mcbc/sage
----------------------------------------------------------------------
| Sage Version 4.4.4, Release Date: 2010-06-23 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
Loading Sage library. Current Mercurial branch is: hackbranch
sage: f(x) = x^2
sage: limit(f,x=1)
1
sage: limit(f(x),x=1)
1
}}}
--
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13221#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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