Re: simplify Arg[E^(I x)]?
- To: mathgroup at smc.vnet.net
- Subject: [mg125756] Re: simplify Arg[E^(I x)]?
- From: Neal Becker <ndbecker2 at gmail.com>
- Date: Sun, 1 Apr 2012 03:35:06 -0400 (EDT)
- Delivered-to: email@example.com
- References: <201203310842.DAA12986@smc.vnet.net>
So can I specify I just want the principle value? On Sat, Mar 31, 2012 at 11:16 AM, Murray Eisenberg <murray at math.umass.edu>wrote: > 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 >