It is possible to use the Aldor compiler WebSite:www.aldor.org to compile functions which you then can use from FriCAS. For details see:

• WebSite:www.aldor.org/docs/HTML/chap18.html

Support for domains and packages is now in the testing stage. The FriCAS/Aldor interface is part of the current FriCAS source distribution. Ralf Hemmecke updated the work of Peter Broadbery and integrated it into FriCAS. In FriCAS you can now simply say:

  ./configure --enable-aldor && make && make install

which will compile a file libaxiom.al and thus make it possible to use the Aldor compiler for FriCAS. Of course, you must have the latest aldor compiler installed.

There is just one issue left that is connected to either the Aldor compiler or FriCAS. See Issues and links therein for more details.

It was possible to use Aldor interface on MathAction including FriCASWiki. But current Aldor does not build on machine running FriCASWiki. So, until the problem is resolved you can not use Aldor on this website. Instruction below describe how such usage is supposed to work.

Aldor on MathAction

This is a simple example of how to use Aldor on MathAction.

To compile an Aldor function, for example this non-recursive method to compute a factorial, in MathAction the Aldor code appears between \begin{aldor}[fact] ... \end{aldor} tags on the edit page.

#include "axiom.as"

fact(n: PositiveInteger): PositiveInteger == {
    n <= 1 => 1;
    res: PositiveInteger := 1;
    while n > 1 repeat {
        res := res * n;
        n := n-1;
    }
    res
 }

   Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/fact.as using
      AXIOM-XL compiler and options 
-O -Fasy -Fao -Flsp -laxiom -Mno-ALDOR_W_WillObsolete -DAxiom -Y $AXIOM/algebra -I $AXIOM/algebra
      Use the system command )set compiler args to change these 
      options.
   The )library system command was not called after compilation.

The optional [name] parameter is used to name the compiled library file which can be used later on another page in a )library command.

Now call the function in Axiom as you would any other. First get the library

)lib fact

Reading /var/aw/var/LatexWiki/fact.asy

Now we test it:

fact(11)

   >> System error:
   #<SB-SYS:FD-STREAM for "file /var/aw/var/LatexWiki/fact.fasl" {1004A133B3}> is
a fasl file compiled with SBCL 1.0.47, and can't be loaded into SBCL 1.1.1.

If you care to, you can also look at the Aldor source generated lisp code and the final compiled result

Here is an example from WebSite:www.aldor.org/docs/HTML/chap18.html

#include "axiom.as"
#pile

MatrixSymmetry(R:Field): with
        symmetricPart : Matrix R -> Matrix R
                ++ `symmetricPart(M)' returns a symmetric
                ++ matrix `S', computed as `(M + transpose M)/2'.
                ++ The difference `M - S' is antisymmetric.

        antisymmetricPart : Matrix R -> Matrix R
                ++ `antisymmetricPart(M)' returns an antisymmetric
                ++ matrix `A', computed as `(M - transpose M)/2'.
                ++ The difference `M - A' is symmetric.
== add
        import from R, Integer

        symmetricPart(m: Matrix R): Matrix R ==
                mt := transpose m
                inv(2::R) * (m + mt)

        antisymmetricPart(m: Matrix R): Matrix R ==
                mt := transpose m
                inv(2::R) * (m - mt)

   Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/2504912445765138530-25px004.as
      using AXIOM-XL compiler and options 
-O -Fasy -Fao -Flsp -laxiom -Mno-ALDOR_W_WillObsolete -DAxiom -Y $AXIOM/algebra -I $AXIOM/algebra
      Use the system command )set compiler args to change these 
      options.
   The )library system command was not called after compilation.

m := matrix[[1/2,1/3],[1/4,1/5]]

(1)

s := symmetricPart m

   There are no library operations named symmetricPart 
      Use HyperDoc Browse or issue
                           )what op symmetricPart
      to learn if there is any operation containing " symmetricPart " 
      in its name.

   Cannot find a definition or applicable library operation named 
      symmetricPart with argument type(s) 
                          Matrix(Fraction(Integer))

      Perhaps you should use "@" to indicate the required return type, 
      or "$" to specify which version of the function you need.

See also the more complex examples:

• RandomAlgebra
• FormalFraction
• Interval Arithmetic

More Examples

Having put the following simple domain in a file test.as ::

#include "axiom.as"

Test: with { fact: PositiveInteger -> PositiveInteger }
   == add  { fact(n: PositiveInteger): PositiveInteger == 
              { n <= 1 => 1;
                res: PositiveInteger := 1;
                while n > 1 repeat {
                  res := res * n;
                  n := n-1; }
                res } }

   Compiling FriCAS source code from file 
      /var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/4005392542604933580-25px006.as
      using AXIOM-XL compiler and options 
-O -Fasy -Fao -Flsp -laxiom -Mno-ALDOR_W_WillObsolete -DAxiom -Y $AXIOM/algebra -I $AXIOM/algebra
      Use the system command )set compiler args to change these 
      options.
   The )library system command was not called after compilation.

I compiled it with Aldor as above. In Axiom you should do:

  )co test.as

)sh Test

   The )show system command is used to display information about types 
      or partial types. For example, )show Integer will show 
      information about Integer .

      Test is not the name of a known type constructor. If you want to 
      see information about any operations named Test , issue
                          )display operations Test

fact(5)$Test

   Test is not a valid type.

Known Problems

see Issue #219

Here is a precomputed libaxiom.al that has been produced with src_aldor2.tgz and FriCAS (rev 286).

 # configure --enable-aldor

If aldor is installed and working on your system, then the above command will build the interface. I build FriCAS using SBCL but there seems to be a problem introduced with the most recent release of FriCAS, so you should use an earlier release such as:

  svn co https://fricas.svn.sourceforge.net/svnroot/fricas/releases/1.1.2 fricas-1.1.2