math_const.h
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math_const.h
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			/* -- c++ -- ----------------------------------------------------------
			LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
			http://lammps.sandia.gov, Sandia National Laboratories
			Steve Plimpton, sjplimp@sandia.gov

			Copyright (2003) Sandia Corporation. Under the terms of Contract
			DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
			certain rights in this software. This software is distributed under
			the GNU General Public License.

			See the README file in the top-level LAMMPS directory.
			------------------------------------------------------------------------- */

			#ifndef LMP_MATH_CONST_H
			#define LMP_MATH_CONST_H

			namespace LAMMPS_NS {

			namespace MathConst {
			static const double THIRD = 1.0/3.0;
			static const double TWOTHIRDS = 2.0/3.0;
			static const double MY_PI = 3.14159265358979323846; // pi
			static const double MY_2PI = 6.28318530717958647692; // 2pi
			static const double MY_3PI = 9.42477796076937971538; // 3pi
			static const double MY_4PI = 12.56637061435917295384; // 4pi
			static const double MY_PI2 = 1.57079632679489661923; // pi/2
			static const double MY_PI4 = 0.78539816339744830962; // pi/4
			static const double MY_PIS = 1.77245385090551602729; // sqrt(pi)
			static const double MY_ISPI4 = 1.12837916709551257389; // 1/sqrt(pi/4)
			static const double MY_SQRT2 = 1.41421356237309504880; // sqrt(2)
			static const double MY_CBRT2 = 1.25992104989487316476; // 2*(1/3)
			}

			}

			#endif