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           COPYRIGHT NOTIFICATION

This program discloses material protectable under copyright laws of
the United States. Permission to copy and modify this software and its
documentation for internal research use is hereby granted, provided
that this notice is retained thereon and on all copies or modifications. 
The University of Chicago makes no representations as to the suitability 
and operability of this software for any purpose. 
It is provided "as is" without express or implied warranty.

Use of this software for commercial purposes is expressly prohibited
without contacting 

   Jorge J. More'
   Mathematics and Computer Science Division
   Argonne National Laboratory
   9700 S. Cass Ave.
   Argonne, Illinois 60439-4844
   e-mail: more@mcs.anl.gov

Argonne National Laboratory with facilities in the states of
Illinois and Idaho, is owned by The United States Government, and
operated by the University of Chicago under provision of a contract
with the Department of Energy.

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           INSTRUCTIONS
          
The compressed tar file icf.tar.gz contains the MINPACK-2 
incomplete Cholesky factorization and a test program.

1. Create the icf directory structure with

       gzip -d icf.tar.gz
       tar -xvf icf.tar

   This produces the directory icf and several subdirectories.

2. Set the environment variable ARCH. Installation has been tested
   on linux, rs6000, solaris, irix, and alpha systems. Installation 
   usually works on other systems but has not been tested. The file
   README in the utils directory contains more systems information.

3. Change directories to icf and install icf with
 
       make install

   This creates libraries in each of the subdirectories and
   the executable icf

4. Run the sample problems by executing icf, and compare the output in 
   icf.info with the output on a similar system, icf.linux, for example.


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      INSTRUCTIONS for MATLAB interface
 
1. Change directory to the matlab subdirectory

2. If you have not installed the icf library
 
       make install

3. Create the mex files with
 
       make matlab
 
   and run the test program cgtest.m from MATLAB

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           ADDITIONAL INFORMATION

Chih-Jen Lin and Jorge J. More',
Incomplete Cholesky factorizations with limited memory,
SIAM Journal on Scientific Computing, 21, pages 24-45, 1999.

http://epubs.siam.org/sam-bin/dbq/article/32733

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Last modification: February 4, 2001