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 Ninja
 =====
 
 - Ninja - version 1.1.0
 - Author: Tiziano Peraro
 
 *Ninja* implements the *Laurent series expansion* method for the
 computation of *one-loop integrals*.
 
 It is based on:
 
 - P. Mastrolia, E. Mirabella and T. Peraro,
    "*Integrand reduction of one-loop scattering amplitudes through
    Laurent series expansion*,"
    JHEP 1206 (2012) 095
    [arXiv:1203.0291 [hep-ph]](http://arxiv.org/abs/arXiv:1203.0291).
 
 - T. Peraro,
    "*Ninja: Automated Integrand Reduction via Laurent Expansion for
    One-Loop Amplitudes*,"
    Comput. Phys. Commun. 185 (2014) 2771
    [arXiv:1403.1229 [hep-ph]](http://arxiv.org/abs/1403.1229)
 
 
 Installing Ninja
 ----------------
 
 Ninja can be compiled and installed with the commands
 
     ./configure
     make
     make install
 
 In order to compile and link the built-in interface to the
 [OneLoop](http://helac-phegas.web.cern.ch/helac-phegas/OneLOop.html)
 library use `--with-avholo[=FLAGS]` during configuration e.g.
 
     ./configure --with-avholo
     make
     make install
 
 if OneLoop is installed in a standard directory, or
 
     ./configure --with-avholo='-L/path/to/avh_olo/lib -lavh_olo' \
         FCINCLUDE=-I/path/to/avh_olo/include
     make
     make install
 
 if it is installed in `/path/to/avh_olo/lib` and the corresponding
 Fortran90 module `avh_olo` is installed in `/path/to/avh_olo/include`.
 
 In order to compile the built-in interface to the
 [LoopTools](http://www.feynarts.de/looptools) library (requires
 LoopTools-2.9 or later) use `--with-looptools[=FLAGS]` during
 configuration e.g.
 
     ./configure \
         --with-looptools='fldflags -L/path/to/looptools/lib -looptools' \
         CPPFLAGS=-I/path/to/looptools/include
     make
     make install
 
 where `/path/to/looptools/` is the directory where LooTools is
 installed and `fldflags` stands for the additional flags the library
 requires for static linking (you can find them e.g. in the file
 `bin/fcc` in the main installation directory of LoopTools).  You can
 omit the `FLAGS` argument of `--with-looptools` if you do not wish to
 compile the examples.
 
 For a full list of available options type
 
     ./configure --help
 
 See the file `INSTALL` for more information about the installation
 procedure.
 
-If you specified the --prefix option for the configure scrip, you
+If you specified the `--prefix` option for the configure scrip, you
 should also add the directory where the library is installed to your
 `LD_LIBRARY_PATH` (and `DYLD_LIBRARY_PATH` on Mac OS) environment
 variable, if not already present.  This is typically a sub-directory
 `lib/` or `lib64/` of the one you specified with `--prefix`.
 
 The examples which come with the distribution can be compiled, after
 installation, using the command
     
     make examples
 
 either in the top directory or in the examples/ directory.  Examples
 using POSIX threads can be compiled (if supported) with
 
     make thread-examples
 
 
 
 Installing the package NinjaNumGen
 ----------------------------------
 
 The Python package *NinjaNumGen* can be used both as a Python module
 and as a script in order to generate the input needed for Ninja.  It
 can be installed using the command
 
     python setup.py install
 
 in the `utils/` directory.  The command
     
     python setup.py --help
 
 will give a list of installation options.  If you specified the
 `--prefix` option during installation, update your `PATH` and
 `PYTHONPATH` environment variables accordingly.
 
 The packege NinjaNumGen requires [Form-4](http://www.nikhef.nl/~form)
 or later.