jm@france-paris.org

Dr. Jean-Michel Collard

225 Reputation

9 Badges

18 years, 2 days

MaplePrimes Activity


These are replies submitted by jm@france-paris.org

@acer 

Hello Acer,

I apologize for my approxmatif English :)

I just wanted to ask : why after the release of a new Maple version the ratio nonCUDA/CUDA diminishes.

No more, no less :)

Brrrr I was quite good in English in my youth.Geez

Happily in Mathematics the words are almost the same.

@Carl Love 

Carl,

I think that your last post is a bit ...rough.

I am not used to "rough" messages!

I am an old retired mathematician...this means that I presumably am not silly.

Your little program is particulary wise!

So I won't use uour e-mail address as to this subject. I will shut on it.

However try my things with 'in' and you SHALL have an...ERROR.

So think a bit more on 'diff'.

For me this discussion ies closed.

Kind regards,

Jean-Michel

@Carl Love

Bonsoir Carl .

I suppose you are allowed to see the e-mails addresses of MaplePrimes users.

I would like you to pick my email. This way it would be possible for me to send e-mail about your solution

at what I posted.

This may be very boring for this "forum".

Kind regards,

Jean-Michel

Thank you Tom and Carl I got it this time.Many thankx.

For example for INT this doesn't work and I have an error message..

*I* missed something and my GI were really garbage!

It's akmost 3 in the morning here and I hope I have been clear.

Take care you two.

Jean-Michel

@tomleslie

 

Hello Tom,

Thankx for your reply.

Well...I EXPECT an ERROR when inputing this GI.

Of course this is NOT a bug of Maple,that I understand.

I suspect this is a misconception of Maple. This really should spits an ERROR !

Best Tom.

 

The philosophy of GIGO (Garbage In Garbage Out) is very simple :

I input to Maple a GI but Maple spits out a GO !

As I said in my previous post Maple should have returned an error.

No Carl it was not necessary to open a new thread for a simple question : I was talking about the Physics package at some point so I thought that I could ask this question.

Best.

 

 

Hello all ,

- Carl :

When I was a student (a long time ago) I had lectures on "Logique et théories axiomatiques" (No need to translate I think)

so I know what is a "libre" (free) variable and a "liée" (bound) Variable :)

I also had lectures on Category Theory ..It was mainly the book "Categories for the working mathematician" (Springer-Verlag).Excellent book.

Anyway this was a long time ago and I passed my Ph.D on differential geometry/topology . (Exotic Spheres)

Now what I do with Maple : I mainly use the "packages" DG, GrTensor,Physics.

Si I am not an expert on the other things of Maple even after 30 years...

There are a *lot* of things I don't know in Maple...

Now : Maple *should* return an error when I do stupid things like (x+y=1)' ==> 1=0 .

Now I work on Minimal Surfaces  and Cosmology when I have time.

For short thank you Carl!

 

-Edgardo :

Any idea to implement 2-spinors in the Physics pckage ?

 

Best to all.

Thank you *very* much Kitonium.

 

Hello Kitonium,

Thank you but this is not exactly what I'm looking for.

What you wrote is the link to all my "questions".

With that I can't reply to Carl.

Best

@Kitonum 

 

Thnks Kitonim now I can sleep on my two ears :-)

Best to all

@J F Ogilvie

- I would like spinors to be added in the Physics Package.

- the GMP Librarie version (big num library)  6.2.1 , Maple is still at 3.1.1 (https://gmplib.org/)

@gdikal

As to me I use it essentially for differential geometry with the Physics package and the GRTensor package.

I don't use very much Maple for anything else.

 

Hello all,

Incidently you forgot to mention Hawking. Hawking studied this thoroughly this model in 1973 (The large structure of spacetime)

I am working at the moment on this model with indeed the help of the Physics package.

You didn't also mention that is model has *closed timelike geodesics* , this means that we can travel in time.

Unrealistic of course but Gödel wanted to prove that "strange" models of the Universe verify the Einstein field equations.

Best,

Jean-Michel

Hello,

I would like that Maplesoft updates the great GMP Library to the latest version 6.2 ( https://gmplib.org/).

It's been years and years that Maple has the GMP 5.1.1 library.

kernelopts(gmpversion);
                            "5.1.1"


Best,

Jean-Michel

Hello all :)

It seems that this problem is happening for Windows users (then including me)??

Is there any linux and Mac users here with this problem?

Thanks.

Jean-Michel

PS: Mister Michalkvasnicka you should shut up! This is not a way to speak on a public forum to Maplesoft developers.

Thank you very much.

 

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