Please help me to find a reference (book) for the following upper bound of Gamma function
For $x \geq 1$ $ \Gamma(x)\leq x^{x-1}. $
Thank you.
Please help me to find a reference (book) for the following upper bound of Gamma function
For $x \geq 1$ $ \Gamma(x)\leq x^{x-1}. $
Thank you.
Does it have to be a book? Here is the original paper (Anderson and Qiu 1997).