#11948: Fix numeric evaluation of error function
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Reporter: jdemeyer |
Owner: jdemeyer
Type: defect |
Status: closed
Priority: major |
Milestone: sage-4.8
Component: numerical |
Resolution: fixed
Keywords: erf erfc |
Work issues:
Report Upstream: N/A |
Reviewers: Karl-Dieter Crisman
Authors: Jeroen Demeyer |
Merged in: sage-4.8.alpha6
Dependencies: #11130, #11321, #11854, #11891, #11890, #11836, #11952 |
Stopgaps:
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Comment (by kcrisman):
Now, in 5.1.beta6's gp I get
{{{
$ Downloads/sage-5.1.beta6/sage -gp
GP/PARI CALCULATOR Version 2.5.1 (development git-5c5e253)
i386 running darwin (x86-64/GMP-5.0.2 kernel) 64-bit version
compiled: Jun 25 2012, gcc-4.6.3 (GCC)
(readline v6.2 enabled, extended help enabled)
Copyright (C) 2000-2011 The PARI Group
PARI/GP is free software, covered by the GNU General Public License, and
comes
WITHOUT ANY WARRANTY WHATSOEVER.
Type ? for help, \q to quit.
Type ?12 for how to get moral (and possibly technical) support.
parisize = 8000000, primelimit = 500509
? erfc(3*I)
%1 = 0.E-35 - 1629.5516567497094550267455532288372861*I
}}}
so I see that this is still in "our" version of Pari. Is this fixed
upstream? Is it possible that this is not actually a bug in Pari, but in
our use of it? Wolfram Alpha
[http://www.wolframalpha.com/input/?i=erfc%283*i%29 gives the mpmath
answer], for what it's worth.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11948#comment:16>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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