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The Parma Polyhedra Library (PPL) is a modern C++ library for the
manipulation of convex polyhedra. To be more precise, the PPL can handle
all the convex polyhedra that can be defined as the intersection of a
finite number of closed hyperspaces, each described by an equality or a
non-strict inequality with rational coefficients. (More details are
available on the PPL's internal mechanisms.) The Parma Polyhedra Library
is:

   - user friendly: you write x + 2*y + 5*z <= 7 when you mean it;
   - fully dynamic: available virtual memory is the only limitation to
     the dimension of anything;
   - written in standard C++: meant to be portable;
   - exception-safe: never leaks resources or leaves invalid object
     fragments around;
   - rather efficient: and we hope to make it even more so;
   - thoroughly documented: perhaps not literate programming but close
     enough;
   - free software: distributed under the terms of the GNU General
     Public License.

WWW: http://bugseng.com/products/ppl