Simplifying the exponents

*To*: mathgroup at smc.vnet.net*Subject*: [mg79994] Simplifying the exponents*From*: "Jung-Tsung Shen" <jushen at gmail.com>*Date*: Fri, 10 Aug 2007 01:50:42 -0400 (EDT)

Hello, I would like to ask a question which I haven't been able to find a solution that does not need human intervening. I would like to simplify the following expression Exp[I (q1 y1 + q2 y2 + q3 y3) - I (qp1 y1 + qp2 y2 + qp3 y3)] according to y1, y2, and y3 so it would look like Exp[I (q1-qp1) y1+ I (q2-qp2) y2 + I (q3-qp3) y3], or Exp[I (q1-qp1) y1] * Exp[I (q2-qp2) y2] * Exp[I (q3-qp3) y3] How could I achieve this in an efficient way? Thanks. JT

**Follow-Ups**:**Re: Simplifying the exponents***From:*"Jung-Tsung Shen" <jushen@gmail.com>

**Re: Simplifying the exponents***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>