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arxiv: 1210.0046 · v2 · pith:ZRZKFCULnew · submitted 2012-09-28 · 🧮 math.CA

On functional inequalities for the psi function

classification 🧮 math.CA
keywords functioninequalitiesderivativefunctionalgammagiveinvolvinglogarithmic
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In this note we study the monotonicity of the function $x\mapsto \psi(1 +bx)^a/\psi(1 + ax)^b$. We also give the several inequalities involving the psi function, whic is the logarithmic derivative of the gamma function.

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