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MathGroup Archive 2001

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complicated recursion relations

  • To: mathgroup at
  • Subject: [mg26748] complicated recursion relations
  • From: RUDOLPH JOHN MAGYAR <rjmagyar at>
  • Date: Fri, 19 Jan 2001 02:14:23 -0500 (EST)
  • Organization: Amherst College
  • Sender: owner-wri-mathgroup at

I have a set of four functions which are related by a series of recursive formulae.  For example (The real problem is a much messier version of this),


b[n+1]*sin((n+1)/2*pi) -d[n-1]*sin((n-1)/2*pi)
+c[n+1]*sin((n+1)/2*pi) -e[n-1]*sin((n-1)/2*pi)
= d[n]*sin(n/2*pi) - e [n]*sin(n/2*pi)

b[n+1]*sin(3(n+1)/2*pi) -d[n-1]*sin(3(n-1)/2*pi)
+c[n+1]*sin(3(n+1)/2*pi) -e[n-1]*sin(3(n-1)/2*pi)
= d[n]*sin(3n/2*pi) - e [n]*sin(3n/2*pi)

Well, I actually have more terms and a bigger mess, but can I use mathematica to untangle this mess like this?

Rudolph J. Magyar
rjmagyar at
Web Address:

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