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MathGroup Archive 2002

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Re: Simple Recursive Map

  • To: mathgroup at
  • Subject: [mg35425] Re: [mg35398] Simple Recursive Map
  • From: "Johannes Ludsteck" <johannes.ludsteck at>
  • Date: Fri, 12 Jul 2002 04:28:38 -0400 (EDT)
  • Organization: Universitaet Regensburg
  • Sender: owner-wri-mathgroup at

Dear Reuben,

Nest[{#[[2]]-a #[[1]]^2-1, b #[[1]]}&,{x0,y0},50]

or (easier to read)

rec[{x_,y_}]:= {y-a x^2-1, b x}


Best regards,

On 11 Jul 2002, at 5:24, Reuben wrote:

> I have the map
> x_n+1=y_n-a*(x_n)^2 - 1
> y_n+1=b*x_n
> If I specify a,b, x_0 and y_0, how can I make Mathematica iterate
> through this numerically to give me x_50 and y_50?
> Thanks
> Reuben

Johannes Ludsteck
Institut fuer Volkswirtschaftslehre
Lehrstuhl Prof. Dr. Moeller
Universitaet Regensburg
Universitaetsstrasse 31
93053 Regensburg
Tel +49/0941/943-2741

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