TheCaculationOfSpecialFunction

代码说明：

  包含各种特殊的数学函数：伽马函数；误差函数； 贝塞尔函数；贝塔函数；正态分布函数 ；卡方分布函数以及各种积分函数(Includes a variety of special mathematical functions: Gamma function error function Bessel function Beta function normal distribution function chi-square distribution function, as well as a variety of integral function)