@mskalsi It makes a difference where your cursor is placed when you right-click to bring up the context menu to get to the Export menu. You want the cursor to be inside the imaginary bounding box of the plot, but not on the surface itself. If the cursor is on the surface itself, then that surface becomes the "selected" object which has a "context". The color of the selected object is lightened to indicate that it is selected. That lightened color survives through the exporting process, even though that seems ridiculous to me.

@max125 You wrote:

So it doesn't make a difference if you use {}  or [ ], when we define f,h.

No, {} and [] are different. A list, created with [], respects order and repetition; a set, created with {}, doesn't:

evalb( {8,9,6,7} = {8,9,7,6} );

     true

evalb( [8,9,6,7] = [8,9,7,6] );

      false

Can anyone recommend me a maple programming guide, for newbies?

You refer to "the following mapping", but I see no mapping. You refer to "the above procedure", but I see no procedure.

I agree with Tom: Please post your code. There's nothing that you've shown so far that would explain why they're printing in a column.

@JacquesC Ask on Stack Overflow instead. The question will very likely be rejected at math.stackexchange as being not math-related.

@Vic Iterator doesn't exist in Maple 2015. In Maple 2015, do

L:= convert(A, listlist):
J:= combinat:-cartprod(L):
['J[nextvalue]()' $ mul(nops~(L))];

@Marko Riedel There was one other change that I made that I didn't mention in my write-up. I made it at four places in your code. If L is a list and n and m are valid indices to it, then

[L[m], L[n]]

is the same as

L[[m, n]].

This can be extended to any number of terms. I don't think that this gives much time savings, but it shortens the code, especially when the name L is more than one letter.

Recovering a "MAS" autosaved backup file is very easy; I do it very often. Pull down the File menu => Recent Documents => Restore Backup. That's it.

@Markiyan Hirnyk It's difficult for me to give concrete examples because I don't remember exactly what the old titles were. However, an example of a class of title changes that I find unhelpful are those that contain the precise text of an error message. I would rather see that precise text than simply something such as "Error in dsolve."

Often titles are changed to include words with very low information content. A recent example of this is a title that was changed to "Problem with procedure." In that case, all three words have very low information content.

Would you please comment specifically on the editing of the titles of Questions? A very large number of Questions have their titles edited in a way that I find unhelpful. For one thing, I think that the specificity of the titles is often drastically reduced, which will make the topic harder to find by a search engine. However, I do think that the editing of titles for spelling is appropriate as it improves searchability.

@vv Since Maple 12, the set ordering is predictable, but not specifiable by the user. See option setorder at ?maple.

@John Fredsted Yes, I realized after posting that I had given a bad Answer. I thought that I deleted it, but I guess not. Well, might as well let it stand now.

Part of the confusion is that the indexing is probably pointless if sets are used.

@Markiyan Hirnyk

In all fairness, you must recuse yourself from any moderation in this thread.

@vv Did you try to make two consecutive calls to Normalize with different input and no intervening restart?

Normalize([1,3,1,3,2,2,4,4]);
Normalize([2,4,4,1,2,2,3,3]);

@Joe Riel Why does your first procedure not need forget but mine does?