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// Mathematical and physical constants
// M_ is a mathematical constant
`define M_E 2.7182818284590452354
`define M_LOG2E 1.4426950408889634074
`define M_LOG10E 0.43429448190325182765
`define M_LN2 0.69314718055994530942
`define M_LN10 2.30258509299404568402
`define M_PI 3.14159265358979323846
`define M_TWO_PI 6.28318530717958647693
`define M_PI_2 1.57079632679489661923
`define M_PI_4 0.78539816339744830962
`define M_1_PI 0.31830988618379067154
`define M_2_PI 0.63661977236758134308
`define M_2_SQRTPI 1.12837916709551257390
`define M_SQRT2 1.41421356237309504880
`define M_SQRT1_2 0.70710678118654752440
* Do we need these? For now they are not available.
// The following constants have been taken from
// P_ is a physical constant
// charge of electron in coulombs
`define P_Q 1.602176462e-19
// speed of light in vacuum in meters/sec
`define P_C 2.99792458e8
// Boltzmann's constant in joules/kelvin
`define P_K 1.3806503e-23
// Planck's constant in joules*sec
`define P_H 6.62606876e-34
// permittivity of vacuum in farads/meter
`define P_EPS0 8.854187817e-12
// permeability of vacuum in henrys/meter
`define P_U0 (4.0e-7 * `M_PI)
// zero celsius in kelvin
`define P_CELSIUS0 273.15
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