#12449: Improve the way that sage evaluates symbolic functions on basic types
---------------------------------------------+------------------------------
Reporter: bober | Owner: bober
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.0
Component: symbolics | Keywords: gamma function
Work_issues: | Upstream: N/A
Reviewer: Burcin Erocal, Jonathan Bober | Author: Jonathan Bober,
Burcin Erocal
Merged: | Dependencies: #4498, #12507,
#9130
---------------------------------------------+------------------------------
Changes (by jdemeyer):
* status: positive_review => needs_work
Comment:
There is numerical noise. On hawk (OpenSolaris 06.2009-32):
{{{
sage -t --long -force_lib devel/sage/sage/symbolic/function.pyx
Warning: divide by zero encountered in divide
**********************************************************************
File
"/export/home/buildbot/build/sage/hawk-1/hawk_full/build/sage-5.0.beta8/devel
/sage-main/sage/symbolic/function.pyx", line 185:
sage: cot(complex(1,2))
Expected:
(0.03279775553375259-0.9843292264581908j)
Got:
(0.03279775553375261-0.9843292264581911j)
**********************************************************************
sage -t --long -force_lib devel/sage/sage/functions/hyperbolic.py
Warning: divide by zero encountered in divide
Warning: divide by zero encountered in divide
**********************************************************************
File
"/export/home/buildbot/build/sage/hawk-1/hawk_full/build/sage-5.0.beta8/devel
/sage-main/sage/functions/hyperbolic.py", line 543:
sage: float(arccoth(2))
Expected:
0.5493061443340548
Got:
0.5493061443340549
**********************************************************************
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12449#comment:15>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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