Re: Finding parts of Equations...

*To*: mathgroup at smc.vnet.net*Subject*: [mg22068] Re: [mg22031] Finding parts of Equations...*From*: Wagner Truppel <wtruppel at uci.edu>*Date*: Sat, 12 Feb 2000 04:04:27 -0500 (EST)*References*: <200002110738.CAA04704@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

At 2:38 AM -0500 on 2/11/00, Patrick E Crowe wrote: >In other words, given some function F(t), >I do not seem to be able to produce code that recognises that a*F(t)^b >contains the function F(t), for any possible a and b (including other >functions of t). The construct Cases[ exp, _F, { k, \[Infinity] }] will find all occurrences, in the input expression exp, of sub-expressions with head F, from levels k down to Infinity, in the tree that represents the expression. >Can anyone give me a few pointers, tell me of a good Mathematica programming >book that discusses searching in depth (but is accessible to someone who, >though having programming experience, is new to Mathematica), or direct me >to a web site that can help me with what I am trying to do? I thank you for >your help in advance. I highly recommend David Wagner's "Power Programming with Mathematica, The Kernel". It's very readable, covers a lot of ground, and has an excellent chapter on pattern matching. Wagner (no, not the author I just referred to)

**References**:**Finding parts of Equations...***From:*"Patrick E Crowe" <crow@gbis.com>