Re: WhichRootOfUnity
- To: mathgroup at smc.vnet.net
- Subject: [mg73059] Re: WhichRootOfUnity
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Wed, 31 Jan 2007 00:48:51 -0500 (EST)
- Organization: The Open University, Milton Keynes, UK
- References: <epnag3$de0$1@smc.vnet.net>
Artur wrote:
> << NumberTheory`NumberTheoryFunctions`
> WhichRootOfUnity[(-1 + I Sqrt[3])/2]
>
> Who knows how this function works because nothing happened when I executed
> this procedure.
>
> ARTUR
>
Hi Artur,
I do not know what's going on: I have tried the example given in the
online help and no output was returned.
In[1]:=
Needs["NumberTheory`NumberTheoryFunctions`"]
In[2]:=
?WhichRootOfUnity
"WhichRootOfUnity[a] returns {n,k} if a = Exp(2 Pi I k / n) for
a (unique) pair of nonnegative coprime integers k and n with k<n,
otherwise returns unevaluated."
In[3]:=
WhichRootOfUnity[(1+I Sqrt[3])/2]
In[4]:=
$Version
Out[4]=
5.2 for Microsoft Windows (June 20, 2005)
Regards,
Jean-Marc