@acer You are right. I simply forgot about that palette. Sorry about that.

@nm I know that Maple added this functionality for a simple case. But you can do a lot for basic things. See the included document I just made (3-D Rotating vector.mw)

I love LaTeX. I am not a pro but I manage to do what I need. I use Texmaker for it. I will start with IPE and change if it cannot do what I need. Tank you for the suggestions.

Mario

3-D_Rotating_vector.mw

@Christopher2222 Thank you! But AutoCAD is out of the question and GImp is too complicated. I tried it and don't like using it.

@ecterrab It seems that some terms have disappeared in the manipulation. Very sorry about that. I am playing with your "Physics Courseware Support: Mechanics" document. I am trying to determine the best way to express things in conjunction with a document I am creating about using the Lagrangian in Mechanics. You can see that now it works perfectly. Thank you both (jbromell 20 too) for your answers.

Mario

Example_1_corr.mw

Thank you both for your responses. But my mistake was that y = 0 .. a, not b. This was not making everything working the way I was expecting it to work. Sorry for that inconvenience!

Mario :-(

@mmcdara  and  Carl Love 24237

Thank you very much both for your help. Problem solved.

@Christopher2222 

Thank you for taking the time to look that up. For an unknown reason, Maple refused to cooperate. But today, I tried it again and it works perfectly. So it was clearly again a question of windows interaction with Maple. I should have taken the time to restart windows and try again. Sorry for the trouble.

Mario

@ecterrab 

Thank you for taking the time to look that up. For an unknown reason, Maple refused to cooperate. But today, I tried it again and it works perfectly. So it was clearly again a question of windows interaction with Maple. I should have taken the time to restart windows and try again. Sorry for the trouble.

Mario

@ecterrab The d_ was the thing I was not sure.

Thank you very much Steve and Edgardo for all of this. One thing I am doing is to prove this two relations that I saw on the Web:

Of course, the notation at the right of the equations won't appear like that in Maple.  Thank you in advance.

Mario

Thank you both dharr 1781 and acer 22068 .

Acer, as always, the solution that I needed. The procedure Lg is the way I will go. I could not find a way to introduce the constraint i<>j. The if was the solution. Thanks again.

Mario

@dharr 

Thank you for that command. 

You did not use the parameter "form=Lagrange". I explore this and it seems to be it. But you cannot specify the order N+1. It must be link with the number of points. And that command calculates l_i and u bar at the same time. Very interesting! I was able to do a good example in a document that I have included here:A_little_example.mw

By the way, I am still interested to do this calculation:

because I want to learn how to manage a case with i<>j

@rlopez 

You are right. Here the new version. I am so sorry for those who downloaded the wrong version two times. I had to put a «c» after p_[mu] to obtain the right (15). Now I can square both sides and I had to correct manually equations (A). I should have mentioned that the equations A through E were manually written in the document because that's the place I have a problem.

Solution_3.3_page_103_revised.mw

@rlopez 

I did have an error so I am attaching the revised document.  I had to add one element, so now we have A, B, C, D, and E. So now it is correct. So I have the same question, how to obtain A, B, C, D, and E with the clickable functionality. I tried working with the Equation Manipulator but with no success.

Thank you.

Solution_3.3_page_103_revised.mw

@tomleslie 

by saying to me: Or is that a bit difficult for you to understand?

Your last response starting with « I think that ... » and finishing with the plot would have been the exact response I would have liked to receive.

Here is not the place to talk about the way I teach. But if you are interested, it would be my pleasure to exchange an email with you.