Marvelous. Thanks, friend. With that example in hand, I can now work on the recursion dynamics I was originally interested in. Yay!

Cras amet qui numquam amavit / Quique amavit cras amet.

I tried various renditions of what you typed in and it never worked. In all cases I either assigned a numerical value to b, d, or N0 with the = or defined it using := rsolve works, of course, and as you say quite easily with this particular classic exponential growth equation. The code you wrote down does not work. One reason might be because it appears that the MaplePrimes website chopped up some of your post into some unreadable gobbledygook. If you could repost so I can make sure I am doing the right thing, I would be most appreciative.

Cras amet qui numquam amavit / Quique amavit cras amet.

In Mathematica, I would also define the initial condition such as: N[0,b_,d_]:=initial_condition And then I would plot the system over the desired period of time with the ListLinePlot[expression,{t,0,stop_time}] command. So, I'm looking for the Maple 12 equivalents.

Cras amet qui numquam amavit / Quique amavit cras amet.