MathGroup Archive 2002

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Difference /recurrence equations

  • To: mathgroup at
  • Subject: [mg35174] Re: Difference /recurrence equations
  • From: Peter Pein <petsie at>
  • Date: Fri, 28 Jun 2002 02:31:05 -0400 (EDT)
  • Organization: Arcor
  • References: <af990o$8u$>
  • Sender: owner-wri-mathgroup at

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

Hi Andrew,

  first load the Package:


use only upper- or only lowercase Letters for the same function,
use brackets, not braces,
use == for equations, = to assign values.


you should learn how to use rules.

Have fun,

  • Prev by Date: Re: DISPLAY-EPS
  • Next by Date: Re: Assigning to a sublist
  • Previous by thread: RE: Difference /recurrence equations
  • Next by thread: Finding a formula for a sum