Complete monotonicity and logarithmically complete monotonicity properties for the gamma and psi functions |
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Authors: | Chao-Ping Chen |
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Institution: | College of Mathematics and Informatics, Henan Polytechnic University, Jiaozuo City, Henan 454010, PR China |
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Abstract: | We present some complete monotonicity and logarithmically complete monotonicity properties for the gamma and psi functions. This extends some known results due to S.-L. Qiu and M. Vuorinen. |
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Keywords: | Gamma function Psi function Complete monotonicity Logarithmically complete monotonicity |
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