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Peculiar output from Union ?

• To: mathgroup at smc.vnet.net
• Subject: [mg108503] Peculiar output from Union ?
• From: Jack L Goldberg 1 <jackgold at umich.edu>
• Date: Sat, 20 Mar 2010 02:46:52 -0500 (EST)

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