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#### CLHEP:

the class libraries for high energy physics can be downloaded from the internet [2]. The installation is well detailled on the web. For the version we used the installation procedure can be described as follow

1. Create a work directory CLHEP out of the source directory, for example /home/user/CLHEP
2. Go to clhepversion/CLHEP directory and execute the following commands

       ./configure --prefix=/home/user/CLHEP

   (Note that files will be installed under /usr/local if you do not specify a prefix.)

       make

   (Build temporary copies of libraries and executables.)

       make check

   (Run the tests.)

       make install

   (Copy libraries, headers, executables, etc. to relevant subdirectories under .)
3. Set environement variable to indicate where the libraries are located, add the CLHEP/lib directory export

       export LD_LIBRARY_PATH=:$LD_LIBRARY_PATH:/home/user/CLHEP/lib