Sharp upper and lower bounds for the gamma function
@article{Alzer2009SharpUA, title={Sharp upper and lower bounds for the gamma function}, author={H. Alzer}, journal={Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences}, year={2009}, volume={139}, pages={709-718} }
We prove that for all x > 0, we have with the best possible constants α = 0 and .
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