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Simplifying Exponents

• To: mathgroup at smc.vnet.net
• Subject: [mg43899] Simplifying Exponents
• From: wes <wesh at acm.org>
• Date: Fri, 10 Oct 2003 03:06:18 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

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

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  • Re: Simplifying Exponents
    • From: "Peter Pein" <nospam@spam.no>