maybe I can give you some help.
Gamma function is also called the second Euler integral.
Here comes some characterizations.
a f(s)= t(x)=int+infty0t(s−1)exp(−t)dt
s>0
b f(s)=limn!ns/[s(s+1)...(s+n)]
nrightarrow+infty
c B(p,q)=Gamma(p)Gamma(q)/Gamma(pq)
p>0 q>0
d Gamma(2s)=2(2s−1)Gamma(s)Gamma(s+1/2)/sqrt(2pi)
s>0
e Gamma(s)Gamma(1−s)=pi/sin(spi)
0
May it help!
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