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MathGroup Archive 1998

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Re: recursive relation problem ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg13703] Re: recursive relation problem ?
  • From: Paul Abbott <paul at physics.uwa.edu.au>
  • Date: Sat, 15 Aug 1998 04:39:31 -0400
  • Organization: University of Western Australia
  • References: <6qp2vd$aiu@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

cplai at geocities.com wrote:

> I am studying data structure, and always encounter recursive relation
> equations. How do I use mathematica to give general solution of
> recursive relation.
> 
> For example: f(0)=1; f(1)=1; f(x)=x*f(x-1);

Have a look at the DiscreteMath`RSolve` package which is included in the
StandardPackages.

  In[1]:= << "DiscreteMath`RSolve`"
  In[2]:= RSolve[{f[0] == 1, f[1] == 1, f[x] == x*f[x - 1]}, f[x], x]
  Out[2]= {{f[x] -> x!}}

Cheers,
	Paul 

____________________________________________________________________ 
Paul Abbott                                   Phone: +61-8-9380-2734
Department of Physics                           Fax: +61-8-9380-1014
The University of Western Australia            Nedlands WA  6907       
mailto:paul at physics.uwa.edu.au  AUSTRALIA                       
http://www.physics.uwa.edu.au/~paul

            God IS a weakly left-handed dice player
____________________________________________________________________


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