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MathGroup Archive 2007

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Re: Replace certain variable

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74838] Re: Replace certain variable
  • From: "dimitris" <dimmechan at yahoo.com>
  • Date: Sat, 7 Apr 2007 04:06:19 -0400 (EDT)
  • References: <ev51a7$a63$1@smc.vnet.net>

In[4]:=
Replace[F[w]*Exp[I*w*t], w -> x + s*a, {3}]

Out[4]=
E^(I*t*(a*s + x))*F[w]

In[16]:=
E^(I*t*(a*s + x))*F[w] /. E^(h_)[b__, w] -> E^h[b, x + s*a]

Out[16]=
E^(I*t*(a*s + x))*F[w]


=CF/=C7 KFUPM =DD=E3=F1=E1=F8=E5:
> Dear Group
>
> If i have a term like : F[w]*Exp[I*w*t] where F[w] is an arbitrary
> function, and i want to replace w by x+ s*a only in the exponent not
> in F[w], i wonder what is the quickest and easiest way to do it
> provided that i have so many similar terms.
>
> Your help and prompt reply is highly appreciated.
>
> HMQ



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