Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2003
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2003

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Simplifying Exponents

  • To: mathgroup at smc.vnet.net
  • Subject: [mg43914] Re: [mg43899] Simplifying Exponents
  • From: "Peter Pein" <nospam at spam.no>
  • Date: Sat, 11 Oct 2003 01:33:33 -0400 (EDT)
  • References: <200310100706.DAA19540@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Wes,
I can not reproduce the described behaviour:
In[1]:=
$Version
a*Exp[I*t*(-4 + x) - I*t*x]//Simplify
Out[1]=
4.0 for Microsoft Windows (July 16, 1999)
Out[2]=
\!\(a\ \[ExponentialE]\^\(\(-4\)\ \[ImaginaryI]\ t\)\)

Maybe some of the symbols you're using look same but aren't. What does
FullForm[expression] display? Or did you use Hold[] somwhere in your code?

Peter Pein, Berlin
petsie at arcAND.de
replace && by || to write to me

----- Original Message -----
From: "wes" <wesh at acm.org>
To: mathgroup at smc.vnet.net
Subject: [mg43914] [mg43899] Simplifying Exponents


> I am trying to generate rows of a determinant for a Hill's DE. To
> do this I generate a series of exponentials of the typical form
>
> a Exp[I t(-4 + x) - I t x]
>
> where the coefficient a and integer 4 vary from term to term. There
> also may be more terms in the exponent.
>
> Mathematica resolutely refuses to simplify the exponents, which in
> the above case would result in
>
> a Exp[-4 I t].
>
> There are several terms which have different extended exponents but
> the same simplified exponents.
>
> To generate the determinant I need to collect all of the terms having
> the same simplified exponent.
>
> Any advice gratefully received.
>
> Wes
>


  • Prev by Date: Re: Simplifying Exponents
  • Next by Date: How do I get Timing results in Out[]//<Message>?
  • Previous by thread: Simplifying Exponents
  • Next by thread: RE: Simplifying Exponents