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numconsts.hh
//FJSTARTHEADER
// $Id$
//
// Copyright (c) 2005-2021, Matteo Cacciari, Gavin P. Salam and Gregory Soyez
//
//----------------------------------------------------------------------
// This file is part of FastJet.
//
// FastJet is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// The algorithms that underlie FastJet have required considerable
// development. They are described in the original FastJet paper,
// hep-ph/0512210 and in the manual, arXiv:1111.6097. If you use
// FastJet as part of work towards a scientific publication, please
// quote the version you use and include a citation to the manual and
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//----------------------------------------------------------------------
//FJENDHEADER
#ifndef __FASTJET_NUMCONSTS__
#define __FASTJET_NUMCONSTS__
#include "fastjet/internal/base.hh"
FASTJET_BEGIN_NAMESPACE // defined in fastjet/internal/base.hh
// some common useful constants!
const double pi = 3.141592653589793238462643383279502884197;
const double twopi = 6.283185307179586476925286766559005768394;
const double pisq = 9.869604401089358618834490999876151135314;
const double zeta2 = 1.644934066848226436472415166646025189219;
const double zeta3 = 1.202056903159594285399738161511449990765;
const double eulergamma = 0.577215664901532860606512090082402431042;
const double ln2 = 0.693147180559945309417232121458176568076;
FASTJET_END_NAMESPACE
#endif // __FASTJET_NUMCONSTS__