Re: Simplifying Exponents
- To: mathgroup at smc.vnet.net
- Subject: [mg43915] Re: [mg43899] Simplifying Exponents
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Sat, 11 Oct 2003 01:33:34 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
On Friday, October 10, 2003, at 04:06 PM, wes wrote: > 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 > > > Ehm... have you tried Simplify? Simplify[a*Exp[I*t*(-4 + x) - I*t*x]] a/E^(4*I*t) Andrzej Kozlowski Yokohama, Japan http://www.mimuw.edu.pl/~akoz/ http://platon.c.u-tokyo.ac.jp/andrzej/