@Joe Riel 

Certainly, I do not have any environment variable HOME in Windows XP, though I have HOMEPATH and USERPROFILE, containing the path of my user directory. I am not using them though, and prefer to use a local subdirectory under the Maple installation directory.

Edit: By the way, there is also kernelopts(homedir).

@Joe Riel 

Certainly, I do not have any environment variable HOME in Windows XP, though I have HOMEPATH and USERPROFILE, containing the path of my user directory. I am not using them though, and prefer to use a local subdirectory under the Maple installation directory.

Edit: By the way, there is also kernelopts(homedir).

@Joe Riel 

Just note that the inert form in Windows produces the path with backslashes. So, for extracting the base name, this line should be used instead:

StringTools:-RegMatch("[^\\]*$", tmpfile, 'base');

@Joe Riel 

Just note that the inert form in Windows produces the path with backslashes. So, for extracting the base name, this line should be used instead:

StringTools:-RegMatch("[^\\]*$", tmpfile, 'base');

@Christopher2222 

I agree. Making available a snapshot of Primes 1 at its state just before the switch to Primes 2 is the simpler and probably better solution to all these problems, at least in the short term (i.e. until a suitable Primes 2.1 or 3 becomes available). No doubt, if the web archive can provide several snapshots (until sometime in 2008) Maplesoft can do it very easily.

@acer 

I have done already a bit of sieving of threads containing articles on the generic issue labeled abstract linear algebra. I have divided them in two lists: "explicit linear algebra" (about issues like block matrices) and "formal linear algebra" (about symbols standing for matrices):

Explicit linear algebra

Width-And-Depth

LinearAlgebra-Has-Problems-Superseding-Linalgs-Functionality

Illumination-From-MapleSoft

Block-Matrix-Computations-With-Linalg-Or-LinearAlgebra

Calculateexpressinputoutputthe-Determinant

Block-Matrix-Computations-With-Linalg-Or-LinearAlgebra

Formal linear algebra

How-Do-I-Solve-A-System-Of-Matrix-Equations-Without-Specifying-The-Elements-In-The-Matrices

Better-Matrix-Algebra-Support

Formal-Matricial-Calculus

Mathematica-6

Propagation-Of-antisymmetries

Symbolic-Vector-Manipulation

Dealling-Matrix-With-Maple

In the GUIs you get it by interface(prettyprint=1).

@otherworld314 

As I have noted above, it is not just a problem of names of vectors, but of names in general.

@otherworld314 

As I have noted above, it is not just a problem of names of vectors, but of names in general.

@Frank DiJoseph 

Just use function calls like:

f:=a*z(z)^2 + b*w;
diff(f,z);
                                     2
                          f := a z(z)  + b w


                                   /d      \
                          2 a z(z) |-- z(z)|
                                   \dz     /


eq1:= a*diff(z(z),z) + b*diff(w(w),w)^2;
                           /d      \     /d      \2
                  eq1 := a |-- z(z)| + b |-- w(w)|
                           \dz     /     \dw     /

diff(eq1,z);

                               / 2      \
                               |d       |
                             a |--- z(z)|
                               |  2     |
                               \dz      /

diff(eq1,w);

                                     / 2      \
                           /d      \ |d       |
                       2 b |-- w(w)| |--- w(w)|
                           \dw     / |  2     |
                                     \dw      /

@Frank DiJoseph 

Just use function calls like:

f:=a*z(z)^2 + b*w;
diff(f,z);
                                     2
                          f := a z(z)  + b w


                                   /d      \
                          2 a z(z) |-- z(z)|
                                   \dz     /


eq1:= a*diff(z(z),z) + b*diff(w(w),w)^2;
                           /d      \     /d      \2
                  eq1 := a |-- z(z)| + b |-- w(w)|
                           \dz     /     \dw     /

diff(eq1,z);

                               / 2      \
                               |d       |
                             a |--- z(z)|
                               |  2     |
                               \dz      /

diff(eq1,w);

                                     / 2      \
                           /d      \ |d       |
                       2 b |-- w(w)| |--- w(w)|
                           \dw     / |  2     |
                                     \dw      /

@pagan 

This thread is related (its focus is solving in non-commutative algebra). In particular, Roman mentions Ore algebras and canonical form issues.

@pagan 

This thread is related (its focus is solving in non-commutative algebra). In particular, Roman mentions Ore algebras and canonical form issues.

@bthur 

It seems to me that it is still too early for a serious interpretation of these numbers. E.g. "single access" visits may have dropped for multiple reasons:

1. Users with experience in Primes 1, on a first visit to Primes 2 may be a bit "lost" with the changes and need to go around a while, trying to make figure out how things work now.

2. As the "All Recent Posts & Questions" list has been showing lately, some users have been quite busy editing legacy posts, adding tags and so on.

3. In my case, mean length of my visits is clearly longer. Sometimes because I get confused by threads that I believe new but are old ones in edit process, and some other times because of investigations on some of the problems of the forum.

As this "accommodation" process may take yet some more time, it seems to me wise to wait a bit longer for drawing conclusions.

This seems to work:

`expand/.`:=FromInert(subs("&*"=".",ToInert(eval(`expand/&*`)))):
expand(a.(b+c));

                          (a . b) + (a . c)

though I have not made any more testing.