#9689: Numerical noise on devel/sage-main/sage/symbolic/expression.pyx
------------------------+---------------------------------------------------
Reporter: drkirkby | Owner: mvngu
Type: defect | Status: new
Priority: major | Milestone: sage-4.5.3
Component: doctest | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Whilst there is no complete 64-bit build of Sage on Solaris x86, a
sufficiently large part of Sage does build (with a few changes) on Solaris
10 x86. When built on 'fulvia', a Dell Optiplex with Xeon processors,
there was a numerical noise issue - see #9099
{{{
sage -t -long devel/sage/sage/symbolic/expression.pyx
**********************************************************************
File "/home/palmieri/fulvia/sage-4.5.2.rc0/devel/sage-
main/sage/symbolic/expression.pyx", line 498\
3:
sage: maxima('sinh(1.0)')
Expected:
1.175201193643801
Got:
1.175201193643802
}}}
A computation with Mathematica, using 60 digits of precision gives
{{{
In[2]:= N[Sinh[1],60]
Out[2]= 1.17520119364380145688238185059560081515571798133409587022957
}}}
The absolute error on Solaris x86 is slighly higher than seen on some
other systems, but this is still a perfectly acceptable result.
This should be fairly easy to fix. I'll make a patch later today
Dave
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9689>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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