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## [Axiom-developer] [#47 complexForm(log(%i) - log(-%i))]

 From: kratt6 Subject: [Axiom-developer] [#47 complexForm(log(%i) - log(-%i))] Date: Wed, 30 Mar 2005 02:43:48 -0600

Changes
http://page.axiom-developer.org/zope/mathaction/47ComplexFormLogILogI/diff
--

??changed:
-\end{axiomi}
\end{axiom}

--removed:
-AXIOM Version of Wednesday December 15, 2004 at 00:50:38
-
-AXIOM ->         complexForm(log(%i) - log(-%i))
-
-                 0
-

??changed:
-  Derive 6.1>      LOG(#i) - LOG(-#i)
-  Maple 9.5.2>     ln(I) - ln(-I);
-  MuPAD 3.1>       ln(I) - ln(-I);
-  Mathematica 5.1> Log[I] - Log[-I]
-  Maxima 5.9.1>    RECTFORM(LOG(%I) - LOG(-%I));
-
-#i*pi
-                 I*Pi
-                 I*PI
-                 I*Pi
-                 %I %PI
-
-======================================================================
-
- > AXIOM ->         complexForm(log(%i) - log(-%i))
- >
- >                  0
-
-[1 more lines...]
Derive 6.1>      LOG(#i) - LOG(-#i)              gives #i*pi
Maple 9.5.2>     ln(I) - ln(-I);                 gives I*Pi
MuPAD 3.1>       ln(I) - ln(-I);                 gives I*PI
Mathematica 5.1> Log[I] - Log[-I]                gives I*Pi
Maxima 5.9.1>    RECTFORM(LOG(%I) - LOG(-%I));   gives %I %PI

However::

AXIOM ->         complexForm(log(%i) - log(-%i))  gives 0

The problem is in the operation "argument":

??changed:
-\end{axioim}
\end{axiom}

--removed:
-

--