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Re: simplify Arg[E^(I x)]?

• To: mathgroup at smc.vnet.net
• Subject: [mg125763] Re: simplify Arg[E^(I x)]?
• From: Anthony Hodsdon <ajhodsd at hotmail.com>
• Date: Sun, 1 Apr 2012 03:38:02 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201203310842.DAA12986@smc.vnet.net>

The following seems to work:

In[24]:= FullSimplify[Arg[E^((2 Pi n + x) I)],  x > -Pi && x <= Pi &&
Element[n, Integers]]
Out[24]= x

Does that help?

--Anthony

-----Original Message-----
From: Neal Becker [mailto:ndbecker2 at gmail.com] 
Sent: Saturday, March 31, 2012 1:42 AM
To: mathgroup at smc.vnet.net
Subject: [mg125763] simplify Arg[E^(I x)]?

Why doesn't this simplify?

Fullsimplify[Arg[E^(I x)], x \[Element] Reals]

I expect to get 'x'.

Is there some way I can get this to simplify?