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Re: difference equation

You need to load the package DiscreteMath`RSolve. You can then use the
command RSolve, which looks a lot like DSolve (for differential equations).
Then try:

RSolve[y[t] == a + b y[t - 1] + y[t - 2], y[t], t]

"Wilfried Stock" <stock at> wrote in message
news:8k3l8a$3af at
> Hi
> I would like to built a difference equatition like:
> Yt=A+b*Yt-1-c*Yt-2
> with Y=f(X)
> I don't find an easy solution.
> Can anyone provide a solution?
> Thanks in advance,
> Wilfried

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