what is half factorial? (1/2)!=? via. Gamma function

Gamma function of negative values (-1/2) | Lesson 5

Evaluating the gamma function of negative numbers -3/2 and -1/2 P 11-5-1

The Gamma Function and (-1/2)!

gamma of (- 1/2), gamma of (- 3/2),gamma of (- 5/2)/ Gamma Function for negative values

What is the factorial of -½?

Negative and fraction gamma function

What is the Gamma Function?

Gamma Function: (-1/2)!

Half factorial using the gamma function

How to Take the Factorial of Any Number

Proof of Γ(1/2)=√π | Proof of gamma half | Property of gamma half

extending the factorial (the Gamma function & the Pi function)

But what is the Riemann zeta function? Visualizing analytic continuation

WHY 1/2!=√π/2 COMPLETE PROOF BY USING GAMMA FUNCTION INTEGRAL

|i Factorial| You Won't Believe The Outcome

What Is The Factorial Of 1/2? SURPRISING (1/2)! = (√π)/2

The Gamma Function

How to calculate the Gamma Function Values

Gamma function at 1/2