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MathGroup Archive 2002

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Re: Difference /recurrence equations

  • To: mathgroup at smc.vnet.net
  • Subject: [mg35129] Re: Difference /recurrence equations
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 25 Jun 2002 19:55:01 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <af990o$8u$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

Needs["DiscreteMath`RSolve`"]

RSolve[{y[t + 2] - 2y[t + 1] + 3y[1] == 4}, y[t], t]

?
Regards
  Jens

Andrew Biggs wrote:
> 
> I'm new to Mathematica and am having trouble with inputting the
> equations I'm looking to solve. I know the basic input of RSolve, but
> can't quite get it. Here's a sample problem, if anyone could show me
> how to input into RSolve I can probably run with the ball after that.
> 
> y(t+2) - 2Y(t+1) + 3Y(1) = 4
> 
> With the part in brackets being a subscript denoting time. I know it
> sounds dumb, but I just don't know the input notatin well enough to
> get a problem typed in correctly, and the Mathematica book is a little
> overwhelming.
> 
> Any help greatly appreciated!
> 
> Andrew


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