Thank you Henrick. You lighted me up again.

Regarding the multivariate recurrence it can't be the same. For example, for the bivariate recurrence t is (t1,t2). In the same article (page 11), is a bivariate example. Do you think that it could be implemented in Mathematica, eventually in a recurrence plot?

Hi Raluca,

well, this is not Maple ...

You need to define an equation, i.e. it should read after RSolve x[t+1] == a[t] ... In a notebook both operators (= and ==) look very similar.

Regarding your question on multivariate recurrence: I may be completely wrong, but to me this seems equivalent to your first problem. In the solution there is nowhere stated that every element needs to be a scalar.

Regards -- Henrik

I tried in Maple because I have never used Mathematica.

I see it is better for this kind of problems.

You don't know how much you helped me. This recurrence stressed me a lot last couple of days.

Do you think I could resolve a multivariate recurrence like Lemma1 (page 5) from the same article?

Thank you so much.

Best wishes and regards,

Raluca