Mathematica 11 Symmetry Packages

SYM is compatible with any version of Mathematica. My site writes up to 8 because that was the latest version at the time. I should update my site ... =)

Please send me an email at [email protected] and I will provide you with the up to date version of SYM.

P.S. Mathematica v10+ have a bug related to the UnProtect command, thats why you might have problems loading the version I have on my site (I should update that too! :$ )

I attempted installation of the MathLie package on Windows 10 by placing it in the AddOns/Packages folder…

You've placed the files in wrong place. As mentioned in SetupMathLie.nb, the MathLie folder should be copied to

FileNameJoin[{$TopDirectory, "AddOns", "Applications"}] // SystemOpen

Then just execute

$MathLiePath = FileNameJoin[{$TopDirectory, "AddOns", "Applications", "MathLie"}]; 

$Path = DeleteDuplicates @ Append[$Path, $MathLiePath];

<< MathLie`

The package will be successfully loaded. Some warnings are generated because MathLie has called several obsolete packages, but according to my quick test, the core functionality is not influenced. An example:

inf = Infinitesimals[D[u[x, t], t] + u[x, t] D[u[x, t], x] 
                     - 1/2 δ D[u[x, t], x, x] + 1/2 u[x, t] D[Log[A[t]], t] == 0, 
                     u, {x, t}, {a}];
inf // LTF