Question

Difference between complete gamma function and lower incomplete gamma function

Answer 1

In mathematics, the upper incomplete gamma function and lower incomplete gamma function are types of special functions, which arise as solutions to various mathematical problems such as certain integrals. ... Similarly, the upper incomplete gamma function is defined as an integral from a variable lower limit to infinity.
In mathematics, the gamma function (represented by the capital Greek alphabet letter Γ) is an extension of the factorial function, with its argument shifted down by 1, to real and complex numbers. ... The gamma function is defined for all complex numbers except the non-positive integers.