Results 31 to 40 of about 199 (44)

A Note on Extrema of Linear Combinations of Elementary Symmetric Functions

open access: yes, 2013
This note provides a new approach to a result of Foregger and related earlier results by Keilson and Eberlein. Using quite different techniques, we prove a more general result from which the others follow easily. Finally, we argue that the proof given by
Alexander Kovačec   +5 more
core   +1 more source

A Sharp Double Inequality for the Inverse Tangent Function [PDF]

open access: yes, 2013
The inverse tangent function can be bounded by different inequalities, for example by Shafer's inequality. In this publication, we propose a new sharp double inequality, consisting of a lower and an upper bound, for the inverse tangent function.
Alirezaei, Gholamreza
core   +1 more source

On two new means of two arguments III [PDF]

open access: yes, 2017
In this paper authors establish the two sided inequalities for the following two new means $$X=X(a,b)=Ae^{G/P-1},\quad Y=Y(a,b)=Ge^{L/A-1}.$$ As well as many other well known inequalities involving the identric mean $I$ and the logarithmic mean are ...
Bhayo, Barkat Ali, Sándor, József
core   +3 more sources

Jordan's Inequality: Refinements, Generalizations, Applications and Related Problems [PDF]

open access: yes, 2006
This is an expository article. Some developments on refinements, generalizations, applications of Jordan’s inequality and related problems, including some estimates for three classes of complete elliptic integrals and several proofs of Wilker’s ...
Qi, Feng
core  

A new way to prove L'Hospital Monotone Rules with applications [PDF]

open access: yes, 2014
Let $-\infty \leq ...
Yang, Zhen-Hang
core  

The monotonicity results and sharp inequalities for some power-type means of two arguments [PDF]

open access: yes, 2012
For $a,b>0$ with $a\neq b$, we define M_{p}=M^{1/p}(a^{p},b^{p})\text{if}p\neq 0 \text{and} M_{0}=\sqrt{ab}, where $M=A,He,L,I,P,T,N,Z$ and $Y$ stand for the arithmetic mean, Heronian mean, logarithmic mean, identric (exponential) mean, the first ...
Mp M, Zhen-hang Yang
core  

M-matrices satisfy Newton's inequalities

open access: yes, 2005
Newton's inequalities $c_n^2 \ge c_{n-1}c_{n+1}$ are shown to hold for the normalized coefficients $c_n$ of the characteristic polynomial of any $M$- or inverse $M$-matrix.
Holtz, Olga
core   +1 more source

A four dimensional Bernstein Theorem

open access: yes, 2019
We prove a four dimensional version of the Bernstein Theorem, with complex polynomials being replaced by quaternionic polynomials. We deduce from the theorem a quaternionic Bernstein's inequality and give a formulation of this last result in terms of ...
Perotti, Alessandro
core  

New Bernstein type inequalities for polynomials on ellipses [PDF]

open access: yes
New and sharp estimates are derived for the growth in the complex plane of polynomials known to have a curved majorant on a given ellipse. These so-called Bernstein type inequalities are closely connected with certain constrained Chebyshev approximation ...
Fischer, Bernd, Freund, Roland
core   +1 more source

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