Thanks, Jacques, for making clear this point concerning surface contra deep types, which exactly hit the nail on the head concerning how I felt about the issue yesterday.

Actually, for a short while yesterday, I tried to formulate something along these lines, but gave up trying because I could not figure out how to put it. With your post you have now provided me with the vocabulary for doing so.

Robert and Joe, thanks for these finer issues of Maple thinking. These are issues which are not immediately apparent to me, indicating, I guess, the present limitations of my knowledge of Maple.

Concerning the mapless property: I did not previously know that something like [sin,cos](x) works just fine.

Note added: I intended for this post to be positioned below (and equally indented as) List of Procedures, but obviously my eyesight in choosing the right post to reply to was bad.

Thanks for those fascinating historical facts. The title of the song by Runrig is Rocket To The Moon.

Thanks for those fascinating historical facts. The title of the song by Runrig is Rocket To The Moon.

I think that I now understand:

L_Riel := [seq](curry(`*`,i),i = 1..3);

is a generalization of

L_Israel := [seq](unapply(i*x,x),i = 1..3);

from one argument to indefinitely many ones, as seen from

map(L_Israel,x);
map(L_Israel,x,y);
map(L_Israel,x,y,z);
map(L_Riel,x);
map(L_Riel,x,y);
map(L_Riel,x,y,z);
                         [x, 2 x, 3 x]
                         [x, 2 x, 3 x]
                         [x, 2 x, 3 x]
                         [x, 2 x, 3 x]
                      [x y, 2 x y, 3 x y]
                   [x y z, 2 x y z, 3 x y z]

Hi Joe,

It made me smile seeing that our posts had crossed each other. I guess I came before you, in time that is, because I typed less letters than you did.

Thanks for your words concerning the award. I had a maplesoft mug shipped (or rather flown, I reckon) all the way from Canada to the little kingdom of Denmark, in the flimsy hope that having coffee contained in a mug with the maplesoft name and logo on would somehow rub off on my performance when working with Maple and when attending this forum. The jury is still out on that issue; a little more data sampling is required. Obviously, it did not help this morning, compare the post Sleepy me.

What is Louis Riel day in Manitoba? Manitoba makes me think of a song by the Scottish band Runrig. Do you know them? They have a song referring to Manitoba. Cannot remember the title of that song, though.

Hi Joe,

It made me smile seeing that our posts had crossed each other. I guess I came before you, in time that is, because I typed less letters than you did.

Thanks for your words concerning the award. I had a maplesoft mug shipped (or rather flown, I reckon) all the way from Canada to the little kingdom of Denmark, in the flimsy hope that having coffee contained in a mug with the maplesoft name and logo on would somehow rub off on my performance when working with Maple and when attending this forum. The jury is still out on that issue; a little more data sampling is required. Obviously, it did not help this morning, compare the post Sleepy me.

What is Louis Riel day in Manitoba? Manitoba makes me think of a song by the Scottish band Runrig. Do you know them? They have a song referring to Manitoba. Cannot remember the title of that song, though.

Yes, the image appears nicely.

You are absolutely right, of course. Prior to posting I thought something along the following lines:

If a sum of an integer (which is algebraic) and something else is algebraic, then that something else must also be algebraic. That, clearly, is not Maple thinking. Thanks for waking me up.

You are absolutely right, of course. Prior to posting I thought something along the following lines:

If a sum of an integer (which is algebraic) and something else is algebraic, then that something else must also be algebraic. That, clearly, is not Maple thinking. Thanks for waking me up.

Welcome back from your respite from MaplePrimes.

I cannot figure out how your suggestion is intended to be used. For instance, writing something like L(x) produces [x, 2 x, 3 x] which is a list of expressions, not a list of maps.

Concerning the use of type instead of is: you are absolutely right, of course. Thanks for pointing that out.

Concerning your example: you may have a point there. Fooling around with that expression I stumbled upon the following.

Why does type([x] + 1,algebraic) and type([x],algebraic) evaluate differently, the former being true, the latter being false?

Concerning the use of type instead of is: you are absolutely right, of course. Thanks for pointing that out.

Concerning your example: you may have a point there. Fooling around with that expression I stumbled upon the following.

Why does type([x] + 1,algebraic) and type([x],algebraic) evaluate differently, the former being true, the latter being false?

Robert, nice to read that it is not just me seeing some funny looking images, compare my post Externally stored images.

Robert, nice to read that it is not just me seeing some funny looking images, compare my post Externally stored images.