Could you please provide the complete code, such as the definitions of bc_cond, slope_cond, etc.? You can upload a Maple worksheet by using the green uparrow, which is the last item on the second row of the toolbar in the MaplePrimes editor.

By "use procedure programming structure in order to get the same results," do you mean that you want to use something like Newton's method?

@GPY 

It does invoke the function; it just doesn't show you the results. The results of statements nested two or more levels deep are by default not displayed. If you want to see it, then you can wrap the invocation in print(...), as in print(cubesum(cubeprod)).

And, yes, the check iroot(cubeprod,3) = i is redundant.

@nm 

Your screen shot shows that you are using Adode Acrobat 9 Pro, which is a PDF reader and writer, not just a PDF reader, such as Adobe Postscript. And, I don't think that Acrobat is freely available.

@Chia 

Your eval statement contains the following list of variables:

That list should contain only the boolean variables, and there should be nv of them.

@Yiannis Galidakis 

You do have a reputation of 10, which is enough to vote up Answers. Also, it does not require any reputation to select an Answer as the best Answer to one's own Question.

@GPY 

Yes, I noticed that you started a new thread for this question. I am about to Answer your Question in that thread. So please end discussion of it here in this thread.

@GPY 

It's an interesting problem. Yes, I believe that it would work. Note that you'd be finding solutions to x^3+y^3 = n, not x^3+y^3 = n^3. The command analogous to isqrt is iroot. There's some question as to whether it's worth using an alternative to x3:= x^3.

@Yiannis Galidakis 

What you want to do with animations can't be done as a frame-by-frame animation. It's a severe limitation of Maple animation. There will always be one fixed set of axes that applies to every frame of the animation.

However, you can use the viewpoint option of plot3d to "get closer to" or "fly by" or even "fly through" a surface. This essentially creates an animation with a single frame viewed from multiple positions. See ?plot3d,viewpoint.

@Preben Alsholm

I see your point. The stepsize clearly makes a difference. 

@Jahani_21 

You have an existing thread on Riemann sums. Followups about Riemann sums should go in that thread.

@Yiannis Galidakis

The evalhf command has been around since at least Maple V r 4, which was also my first version. You should've been using it since the very beginning. It originally didn't work with complex values, but I used to code Julia sets by working with the real and imaginary parts separately.

You just take the Answer to your previous question, change 4 to 2, change 100 to 200, and change sqrt to (x-> x^3). If you're incapable of that level of abstract thinking, you really, really don't belong in whatever class you're taking.

@Jahani_21 What do you think the line below does???

Exact:= int(sqrt(x), x= 0..4);

It "calculate[s] and output[s] the actual area using integration."

@Jahani_21 Just change the second parameter from 20 to 10. That should be obvious.

plot(Sin(x,10), x= -2*Pi..2*Pi);

This thread about the Taylor expansion of sine. If you want to discuss Riemann Sums, USE A DIFFERENT THREAD! I just deleted all other references to that other topic from this thread.

Why would you alter it? Unless you have a special algorithm that works for numbers with only four prime factors, what's the point? Just compute n and apply quadsum.