lemelinm

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15 years, 260 days

 

 

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Mario Lemelin
Maple 14.00 Win 7 64 bits
Maple 14.00 Ubuntu 10,04 64 bits
messagerie : mario.lemelin@cgocable.ca téléphone :  (819) 376-0987

MaplePrimes Activity


These are replies submitted by lemelinm

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 li 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.

@tomleslie 

Well, I have attached a Maple document and an image inside. All the solutions you gave are wrong from the point of view of a physicist.  If a student was to give me that kind of graph, I would have to give him a 0.  Look at the image and you will see what region is the real solution. And the only simple thing I ask is how to plot the right region.  In the document, the first graph is half of the solution.  I want a command that will show how to have the right region fill with color. And never will I give points to someone that starts the masse M and m at -10.  Maybe I should have stated that I was a physicist.

Wrong_region.mw

@tomleslie 

The mass «m» and «M» cannot be negative.  The plot is wrong of course.  Moreover, we don't see the relation M>2*m

@ecterrab By the way, I do have a problem installing it under windows.  I did the command and I receive this message:

`The "Physics Updates" version "865" is installed but is not active. The active version of Physics is within the library C:\\Program Files\\Maple 2020\\lib\\maple.mla, created 2020, March 4, 20:36 hours`

Then I did Physics:-Version(latest) and after some times, a window opens stating that;

"Connection to the kernel has been lost"

I don't have any firewall installed.

Any ideas?

I am using Maple 2020.1 id 1482634.  What command should I do to find the version of my physics package?

Thank you in advance.

Mario

@acer 

As you will see in the attached document, I don't get the true numbers on the vertical axis but the unit is good. The horizontal axis is OK.  Then equation (4) print OK but why (6) is not?  Do you see what I am doing wrong?  I am using Maple 2020.1

Thank you in advance for your help.

Mario

Quark-Quark_interaction.mw

@acer 

Hello to you.  You have well understood the question.  The use of Units:-UseUnit(MeV) is new to me and I will explore it.  It's a nice trick.  And why I didn't think of this one: combine(pmin, units).

Thank you for your fast response.  I think that it would be nice to have this option in the Physics package: with(Physics, Particles) with the possibility to call a particle (for example Pi+) with the values of I, P, Q, S, C, and B.  Mass in MeV/c^2 and lifetime could be interesting too.  Anyway, this idea came to me while I am reading for the pleasure of the following book: Griffiths, Introduction to Elementary Particles, 2008.

Thank you, Acer.

 

@longrob 

Just to mention that 10 years later, I come accross that simple way to dol it in Maple 2020.  So I was able to do manually the calculation and check with Maple if I was right.  Thank you.

Since I will do 3 courses in Quantum Mechanics (MITx), I am wondering if it would be an added bonus to use the physics package?

 

Thank you again for the fast responses.

@ecterrab 

With you answer, I found out that what I can do is:

> DifferentialGeometry:-Library:-MetricSearch()

And I can find all the metrics as we can see in the book: Stephani - Exact Solutions of Einstein's Field Equations -Cambridge University

That is great.  Thank you!

@Christopher2222 

If I put t := 3 [s], I want to be able to transform it in [m] by using the contextual menu..  But for Maple, this is not possible.  I have to do it manually.  When I load the Physics package, I would like that units take into account that c = 1, etc).

Is this possible or too complex?

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