@tomleslie 

Hi!

 Yes, that is exactly what I want to do. Thank you very much for your time. 

(Yes, ten points is enough for the iterates to stay at (0,0). The origin is a (super)attractive fixed point for the function.)

(Yes, C and F1 coincide, sorry I was a little desperate and trying too many things at once).

Thanks a lot!!!

@acer 

Hi!

Thanks a lot for your exhaustive answer.

I was wondering if there was a way to determine an exact solution here that I didn't know of, but I know it's not always (I should say often) possible. 

That infolevel command is really interesting and helpful, I did not know it. 

Thank you again!! :-)

@Carl Love Thank you very much.