Re: Peculiar output from Union ?
- To: mathgroup at smc.vnet.net
- Subject: [mg108511] Re: Peculiar output from Union ?
- From: DC <b.gatessucks at gmail.com>
- Date: Sun, 21 Mar 2010 02:05:41 -0500 (EST)
- References: <ho1ui0$hov$1@smc.vnet.net>
For a generic head f :
In[1]:= Union[f[x, y], f[y, w, z]]
Out[1]= f[w, x, y, z]
hence your result as FullForm[1<x<2]=Less[1,x,2].
Try
In[9]:= Union[Interval[{1, 2}], Interval[{3, 5}]]
Out[9]= Interval[{1, 2}, {3, 5}]
-Francesco
On 03/20/2010 07:47 AM, Jack L Goldberg 1 wrote:
> Hi Folks,
>
> Can anyone explain this:
>
> In[1]:= Union[ 1< x< 2, 3< x< 5 ]
>
> Out[1]= 5< x
>
> ??
>
> I am using a MacBook Pro, OS 10.6.2
>
> Thanks,
>
> Jack
>