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MathGroup Archive 2005

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Re: defining a recursive formula?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg54901] Re: defining a recursive formula?
  • From: Bill Rowe <readnewsciv at earthlink.net>
  • Date: Sat, 5 Mar 2005 01:34:46 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

On 3/4/05 at 5:08 AM, illuzioner at adelphia.net (lou zion) wrote:

>can someone help me represent the following?

>i have a quantity p[R_] := i* R -a

>i need to compute

>F[N_]  := p[p[p[p[p[R]]]]]  to N levels deep.

>how can i do this?

Use Nest as in

Nest[p, R, n]

Note, you should not use N as a variable name since this is already used for system function. In general, it is a good idea to use lower case when naming symbols you define to avoid conflict with built in symbols.
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