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Re: simplify Arg[E^(I x)]?
*To*: mathgroup at smc.vnet.net
*Subject*: [mg125768] Re: simplify Arg[E^(I x)]?
*From*: Murray Eisenberg <murray at math.umass.edu>
*Date*: Sun, 1 Apr 2012 03:39:46 -0400 (EDT)
*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com
*References*: <201203310842.DAA12986@smc.vnet.net>
*Reply-to*: murray at math.umass.edu
First, I presume you just made a typo in your message -- it should be
FullSimplify, with an upper-case S, of course.
Second, one reason the expression doesn't simplify to x is that such a
result would be wrong! For example:
Arg[Exp[(2 Pi + Pi/2) I]]
has value Pi/2 rather than 2 Pi + Pi/2.
On 3/31/12 4:42 AM, Neal Becker wrote:
> 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?
>
--
Murray Eisenberg murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower phone 413 549-1020 (H)
University of Massachusetts 413 545-2859 (W)
710 North Pleasant Street fax 413 545-1801
Amherst, MA 01003-9305
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