==============================================================================

                               I n t e r C a l l

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Update: 

o InterCall is now compatible with Mathematica version 2.1 
o InterCall has been ported to the NeXT.

What is InterCall?

InterCall is a Mathematica package that provides:

o easy access to all the routines in the IMSL and NAG subroutine
libraries .
o interactive access to any other library or user-written code.
o straightforward declaration of default settings for arguments in
external
  routines.

With InterCall you can:

o import routines written in Fortran, C, or Pascal and call them as if
they
  were Mathematica functions.
o call external routines on a remote computer.
o develop and test the robustness and correctness of external libraries.
o write your own interface to other external libraries.

Why Use InterCall?

o To extend the type of problems that Mathematica can solve.
o The full scope of routines in libraries such as IMSL and NAG become 
  available to Mathematica users.
o Intelligent defaults are supplied automatically by InterCall when you 
  call an external routine.
o Inspecting and modifying defaults is simple and uses commands named
  GetDefault and SetDefault.
o Independent documentation, for calling external routines from within
  Mathematica, is not required. 

Who Should Use InterCall?

o Anyone whose work involves numeric processing and who wants 
  Mathematica's ease of use.
o Mathematica users who need to access the IMSL or NAG libraries on a 
  remote machine.
o Current users of IMSL or NAG who want a simple development environment.
o Teachers of courses such as numerical methods. 
o Engineers, scientists, economists, physicists, mathematicians, 
  statisticians etc.

How Does One Use InterCall?

  This loads the InterCall package and the      In[1]:=  <<InterCall`;
  template database for IMSL and NAG.	     In[2]:=  <<InterData`;

To save space the full output from GetDefault has been omitted in the 
following session.

  This imports the IMSL integration routine     In[3]:=  GetDefault[
dqdag ]
  dqdag and indicates how it can be called.     Out[3]=  dqdag[$F_, $A_,
$B_] ->
                                                             $RESULT
  
  This integrates Mathematica's Sin[x]          In[4]:=  dqdag[ Sin[#]&,
0, Pi ]
  function from x = 0 to x = p , using IMSL.    Out[4]=  2.

  This imports the IMSL routine for finding     In[5]:=  GetDefault[
devasb ]
  eigenvalues of a band-symmetric matrix.       Out[5]=  devasb[$A_] ->
$EVAL
  
  This defines a band-symmetric  matrix.        In[6]:=  matrix =
                                                         
{{0,-1,-1,-1,-1,-1},
                                                           {1,2,3,4,5,6}};

  This finds the three smallest eigenvalues.    In[7]:=  devasb[ matrix, 
  NEVAL is documented in the IMSL manual                     $NEVAL -> 3]

                                                Out[7]= {0.25380682011337,
                                                         1.7894724116954,
                                                         2.964906355386}

InterCall completely integrates the symbolic capabilities of
Mathematica with the numeric routines of any external library. You can
pass a Mathematica function, array, or any other expression, as an
argument to any external routine and InterCall will send the correct
type of information to that external routine.

A TeX summary of the InterCall manual (InterCall.tex) is available through
MathSource.  Send the command

	send 0202-587-0022

to the MathSource server at mathsource@wri.com.  The file will be sent
to you by return email.


System Requirements:

InterCall works under Mathematica versions 1.2 and 2.0, and requires 
a Unix kernel.   Remote drivers to access external code on a remote
computer are available for Apollo, Connection Machine, DEC/Ultrix, IBM
RISC, Iris,  Sparc, Sun-3 and VAX/VMS.  Drivers for AViiON, Convex,
HP9000, MIPS and Sony are under development.

If you order InterCall you will get:

o all the files needed to run InterCall on your computer.
o various remote drivers.
o a detailed manual describing how to use InterCall. 

For more information on InterCall, or to order InterCall, please
contact the InterCall distributor:

Analytica
PO Box 343
Subiaco, WA  6008
Australia
Fax/Phone +61 9 388 2590
Email: analytic@earwax.pd.uwa.oz.au


InterCall was developed by:

Dr. Terry Robb
Mathematics Department
Monash University
Clayton 3168
Melbourne VIC
Australia
Email: tdr@vaxc.cc.monash.edu.au
@