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两个包含Gamma函数的对数完全单调函数及其应用.pdf
Vol No
Journal of Shaanxi University of Science Technology Apr
Gam m a
Gam m a
x n
n
Gam m a n Burnside
O A
Logarithmically complete monotonicity of two specific
functions involving Gamma function and applications
Y U A N Zhi f ang WA N G Lian tang
School of M athmatics Northw est U niversity Xian China
Abstract In the article the logarithmically co mplete monotonicity of tw o specific f unctions
involving Gam ma f unction w as proved T hus a new inequality about x w as obtained
A nd then a double inequality about f actorial n w as propo sed and co mpared w ith the existing
conclusions Lastly a best conjecture w as made on the new estimate
Key words Gam ma f unction logarithmically co mplete monotonicity f actorial n Burnsides
f or m ula
I
f
0
I I I
f
I
f
n n
f x x I n Gam m a
I x
f x t e d t Retx
ln x x
I
f
n n x
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