diff --git a/src/math_const.h b/src/math_const.h
new file mode 100644
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--- /dev/null
+++ b/src/math_const.h
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+/* ----------------------------------------------------------------------
+   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 MY_PI  = 3.14159265358979323846; // pi
+  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)
+}
+
+}
+
+#endif