This package provides an implementation of the functions erf and erfc in 
arbitrary precision.
The implementation is documented in the following article:

     S. Chevillard, The functions erf and erfc computed with 
     arbitrary precision. Research report RR2009-04, laboratoire
     de l'informatique du parallélisme (LIP), 46, allée d'Italie,
     69 364 Lyon Cedex 07, 2009.
     Available at http://prunel.ccsd.cnrs.fr/ensl-00356709/

It is free software: you can redistribute it and/or modify it under the terms
of the GNU Lesser General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version. The file COPYING contains a copy of the GNU General Public License and
the file COPYING.LESSER contains a copy of the GNU Lesser General Public
License.

To compile the library, just type
     > make

Test it with
     > make check

If you want, you can tune your library with thresholds specific to your
architecture. See the file tune/boundaryExample.dat for instructions on how to
do it.

Then install it by typing
     > make install

or
     > make install PREFIX="/path/to/some/prefix"



In order to use it you have to include erferfc.h in your program. See for 
instance the file example.c.
This file can be compiled and used through the following commands:

     > gcc -static example.c -c -I"/path/to/some/prefix/include"
     > gcc example.o -o example -lerferfc -lmpfr -lm -L"/path/to/some/prefix/lib"
     > ./example


If you have any question or encounter any problem when installing or using
this program, please send an email to sylvain.chevillard@ens-lyon.org