RE: Simplifying Exponents

*To*: mathgroup at smc.vnet.net*Subject*: [mg43916] RE: [mg43899] Simplifying Exponents*From*: "David Park" <djmp at earthlink.net>*Date*: Sat, 11 Oct 2003 01:33:35 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Wes, In my Version 5 (and Version 4 also) it simplifies. a Exp[I t(-4 + x) - I t x] // Simplify a/E^(4*I*t) David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: wes [mailto:wesh at acm.org] To: mathgroup at smc.vnet.net 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