math_tools.py 文件源码

 复制代码def incomplete_gamma_upper(a, x, precision=9):
    # Numerical approximation of the lower incomplete gamma function to the given precision
    # https://en.wikipedia.org/wiki/Incomplete_gamma_function
    # http://mathworld.wolfram.com/IncompleteGammaFunction.html
    return gamma(a) - incomplete_gamma_lower(a, x, precision)