Composition of series

*To*: mathgroup at smc.vnet.net*Subject*: [mg65337] Composition of series*From*: Geico Caveman <spam at spam.invalid>*Date*: Mon, 27 Mar 2006 06:56:04 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

I am trying to compose two series with Mathematica : One is f1(x) = ... The other is x(y) = ... ComposeSeries quits complaining that the expansion point of the first series is different from the constant term of the second series (ComposeSeries::scmp). What I am really trying to do here is to express f (x) as a series in Log[x] (x is strictly greater than zero), so the second series is simply the series expansion of Exp[y]. Mathematically, what is the problem with even attempting this operation ? Can't I replace x by log(z) in the first series, no matter what ?

**Follow-Ups**:**Re: Composition of series***From:*"Carl K. Woll" <carlw@wolfram.com>