**********************************
Text Options of the Executable phc
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Text options of ``phc`` do not compute anything,
but provide text information about ``phc``.
While the regular options of ``phc`` start with a single dash ``-``,
the text options are double dashed, they start with ``--``.
phc --version : displays the current version string
===================================================
Typing at the command prompt ``phc --version`` displays
the :index:`version string` which includes the current :index:`version number`
and the :index:`release date`.
phc --license : writes the license to screen
============================================
The output of
::
phc --license
is
::
PHCpack is free and open source software.
You can redistribute the code and/or modify it under
the GNU General Pulic License as published by
the Free Software Foundation.
phc --cite : how to cite PHCpack
================================
Typing ``phc --cite`` at the command prompt displays
::
To cite PHCpack in publications use:
Jan Verschelde:
Algorithm 795: PHCpack: A general-purpose solver for polynomial
systems by homotopy continuation.
ACM Transactions on Mathematical Software, 25(2):251--276, 1999.
phc --help : writes helpful information to screen
=================================================
Typing at the command prompt ``phc --help`` provides some
:index:`help` to get started with the quickest use, that is:
with the blackbox solver.
To obtain help about the blackbox solver, type ``phc -b --help``
or ``phc --help -b`` where the ``--help`` may be abbreviated by ``-h``.