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Re: Re: need MathLie mathematica package

  • To: mathgroup at
  • Subject: [mg73978] Re: [mg73933] Re: need MathLie mathematica package
  • From: "Jean-Marc Gulliet" <jeanmarc.gulliet at>
  • Date: Sat, 3 Mar 2007 23:56:00 -0500 (EST)
  • References: <es92kk$40c$> <>

On 3/3/07, Andrzej Kozlowski <akoz at> wrote:
> This package is a part of Gerd Baumann's book "Symmetry Analysis of
> Differential Equations with Mathematica". Anyone who buys the book
> you will get the package for free together with complete
> documentation. Since I assume that the author is still interested in
> selling his book, I feel it is probably inapropriate to write much
> more.


I understand your concerns about copyright issue and intellectual property.
I would like to clarify some points, however.

When I replied to the OP, I was not aware that a book containing the
package have been published. Indeed, I was amused by the OP's request,
since when I tried the obvious, a very simple search with Google using
"MathLie" as keyword, Google returned around 470 hits, and the first
link returned was the incriminated one!

"Index of /pub/Mathematica/MathLie ... LieBaecklundSymmetry.m
11-May-1999 14:17 47k [ ] LieIntegrate.m 11-May-1999 14:17 29k [ ]
MathLie.m 11-May-1999 14:17 ... - 3k - Cached - Similar pages"
(First hit out of 470 returned by Google with the keyword "MathLie",
Saturday, March 3, 2007, 10 AM (GMT))

This link points to a public directory hosted on an official
departmental web server of a reputed university. (We are not talking
about a student's personal web page nor a peer-to-peer file sever
illegally holding copyrighted material.)

Moreover, at first glance, there is no files that seem to contain any
copyright notice or restriction of some sort (contrary to what it is
customary to do on a file server when the material is copyrighted).

Also, these files have been hosted on this public directory since mid-1999.

Now, it is still possible, though very unlikely, that the physics
department of the University of Western Australia illegally hosts some
copyrighted material on its public server since 1999. However, this is
not the first thing that came up to my mind when I replied to the OP.


> Besides, I don't think the package is useable wihtout the book.
> An online version of the whole book is included wiht the paper one,
> but obviously it would not be right or legal to distribute it without
> the author's permission.
> If I rember correctly, the package included with the book I have is
> incompatible with Mathematica 5, although if you read and understnd
> the book you won't really need the package, since all the code is
> included in th ebook and as far as I can remember there is nothing in
> it that requires particularly advanced programing skills.
> Andrzej Kozlowski
> On 3 Mar 2007, at 07:09, Jean-Marc Gulliet wrote:
> > On 3/2/07, Nabeel Butt <nabeel.butt at> wrote:
> >> Dear Mr Jean,
> >>               Yes this is the pakage.But when i open the package
> >> you mention
> >> it gives some cryptic language.It has some strange fonts not
> >> comprehensible
> >> by me.Please check it out and tell me wether there is a remedy to it.
> >>              regards,
> >>              Nabeel
> >>
> >>
> >> On 3/2/07, Jean-Marc Gulliet <jeanmarc.gulliet at> wrote:
> >>> Nabeel Butt wrote:
> >>>> Dear Users,
> >>>>              I need MathLie package for calculating the symmetry of
> >>>> differential equations.Please could you email me the download or
> >>>> suggest
> >>>> where to download it.
> >>>>               Thanks in advance.
> >>>>              regards,
> >>>>               Nabeel
> >>>>
> >>>
> >>> Is this what you are looking for?
> >>>
> >>>
> >>>
> >
> > I have checked the .m file. It appears that they are encoded. They are
> > still plain ASCII but not meant to be read by a human being. (That is
> > one can execute them but cannot see the code.) Therefore, the only
> > thing you can do is saving the .m files within an appropriate
> > directory on your own system and use them. I believe that the regular
> > notebooks must contain some explanations about how to use the
> > packages. (Note that I am not familiar with this package: I have just
> > done a search on Google with the package name as keyword.)
> >
> > HTH,
> > Jean-Marc
> >

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