Re: Questions about "collecting" complex exponentials and simplifying expressions
- To: mathgroup at smc.vnet.net
- Subject: [mg53055] Re: Questions about "collecting" complex exponentials and simplifying expressions
- From: "David Winterbottom" <david.winterbottom at gmail.com>
- Date: Wed, 22 Dec 2004 04:52:45 -0500 (EST)
- References: <6hpd0u$d8r@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In my experience with weakly nonlinear analyses, the best way to proceed is to define the conjugate of A as a separate variable. For example, if we set Y = A[x,X,t,T] Exp[I(wt+kx)] + A^*[x,X,t,T] Exp[-I(wt+kx)] then simply running Expand[Y^2] yields an answer in acceptable form. Of course, instead of "A Conjugate[A]", you now have "A[x,X,t,T] A^*[x,X,t,T]".