This module is a translation of the C math.h file. It exports the following
selected constants and functions:
M_1_PI M_2_PI M_2_SQRTPI M_E M_LN10 M_LN2 M_LOG10E M_LOG2E M_PI M_PI_2 M_PI_4
M_SQRT1_2 M_SQRT2 acos acosh asin asinh atan atanh cbrt ceil cosh erf erfc
expm1 floor hypot j0 j1 jn lgamma_r log10 log1p pow rint sinh tan tanh y0 y1 yn
