Results 31 to 40 of about 357 (103)

Gaps Between Classes of Matrix Monotone Functions [PDF]

open access: yes, 2002
The class Pn(I) of matrix monotone functions of order n, defined on an open interval I, is considered in this paper. Explicit examples are given to prove that if I is different from the whole real line, then Pn+1(I) is a proper subset of Pn(I) for each ...
Frank Hansen, Guoxing Ji, J. Tomiyama
semanticscholar   +1 more source

A Note on Generating Functions for Hausdorff Moment Sequences [PDF]

open access: yes, 2008
For functions $f$ whose Taylor coefficients at the origin form a Hausdorff moment sequence we study the behaviour of $w(y):=|f(\gamma+iy)|$ for $y>0$ ($\gamma\leq1$ fixed)
Roth, Oliver   +2 more
core   +1 more source

Some classes of completely monotonic functions related to q-gamma and q-digamma functions

open access: yes, 2016
In the paper, some classes of completely monotonic functions involving the q -gamma and q -digamma functions are derived. The monotonicity properties of these functions are exploited to establish a double inequality for the ratio of the q -gamma function
A. Salem
semanticscholar   +1 more source

Two monotonic functions involving gamma function and volume of unit ball

open access: yes, 2010
In present paper, we prove the monotonicity of two functions involving the gamma function $\Gamma(x)$ and relating to the $n$-dimensional volume of the unit ball $\mathbb{B}^n$ in $\mathbb{R}^n$.Comment: 7 ...
Anderson G. D.   +12 more
core   +1 more source

Monotonicity properties and inequalities related to generalized Grötzsch ring functions

open access: yesOpen Mathematics, 2019
In the paper, the authors present some monotonicity properties and some sharp inequalities for the generalized Grötzsch ring function and related elementary functions. Consequently, the authors obtain new bounds for solutions of the Ramanujan generalized
Wang Fei, He Jian-Hui, Yin Li, Qi Feng
doaj   +1 more source

Complete monotonicity properties of functions involving q-gamma and q-digamma functions

open access: yes, 2014
In this paper, the q -analogue of the Stirling formula (the Moak formula) for the q gamma function is exploited to prove the complete monotonicity property of functions involving the q -gamma and the q -digamma functions.
A. Salem
semanticscholar   +1 more source

Generalization of Some Inequalities for the Ratio of Gamma Functions [PDF]

open access: yes, 2014
access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright C K. Nantomah   +4 more
core   +1 more source

Rearrangements of general monotone functions and of their Fourier transforms

open access: yes, 2018
We extend further Boas’ conjecture concerning functions nonincreasing on (0,∞) and their Fourier transforms by considering rearrangements of general monotone functions and of their Fourier transforms.
Barry Booton
semanticscholar   +1 more source

An alternative proof of Elezovi\'c-Giordano-Pe\v{c}ari\'c's theorem

open access: yes, 2009
In the present note, an alternative proof is supplied for Theorem~1 in [N. Elezovi\'c, C. Giordano and J. Pe\v{c}ari\'c, \textit{The best bounds in Gautschi's inequality}, Math. Inequal. Appl.
Guo, Bai-Ni, Qi, Feng
core   +1 more source

A certain class of completely monotonic sequences

open access: yesAdvances in Differential Equations, 2013
In this article, we present some necessary conditions, a sufficient condition and a necessary and sufficient condition for sequences to be completely monotonic. One counterexample is also presented.MSC:40A05, 26A45, 26A48, 39A60.
Senlin Guo, H. Srivastava, Necdet Batır
semanticscholar   +2 more sources

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