4 Implementation
  
  The  linboxing  package  consists  three parts. The first part is written in
  GAP,  and  this  consists of test routines and wrappers for functions in the
  linboxing kernel module. The second part is the kernel module's interface to
  GAP,  which  is written in C. This handles the interface between GAP and the
  third  part,  which  is  the  C++  code  which calls functions in the LinBox
  library.
  
  In  the  C++  part  of  the  kernel module, the GAP objects such as vectors,
  matrices and their elements are converted into the corresponding LinBox data
  types.  The  requested  LinBox  function  is  then  called,  and  the result
  converted back onto GAP objects.
  
  Currently,  all GAP matrices are converted into dense matrices in the LinBox
  library.  LinBox  provides  good support for sparse matrices, but at present
  there  is  no  standard  way  in GAP to represent sparse matrices. There are
  plans  to overhaul matrix objects in GAP, and once sparse matrix objects are
  provided in GAP, these should be converted into LinBox sparse matrices.
  
  For  more  details  of  the  implementation, please refer to the source code
  documentation.  The  C and C++ source code can be found in the src directory
  of  the linboxing package, and contains comments which can be converted into
  HTML  documentation using doxygen (which must therefore be available on your
  system). Create this documentation using the following command:
  
  ------------------------------------------------------------------
        cd src
        doxygen Doxyfile
      
  ------------------------------------------------------------------
  
  Point your web browser at src/html/index.html to browse the documentation.