Results 31 to 40 of about 600 (94)

Subdifferential Test for Optimality

open access: yes, 2013
We provide a first-order necessary and sufficient condition for optimality of lower semicontinuous functions on Banach spaces using the concept of subdifferential.
Jules, Florence, Lassonde, Marc
core   +3 more sources

Relative Schur-convexity on global NPC spaces

open access: yesMathematical Inequalities & Applications, 2015
We introduce the concept of relative convexity on spaces with global nonpositive curvature and illustrate its usefulness by a number of inequalities involving the convex functions on such spaces.
Constantin P. Niculescu, Ionel Rovența
semanticscholar   +1 more source

Two double inequalities for k-gamma and k-Riemann zeta functions

open access: yes, 2014
By using methods in the theory of majorization, a double inequality for the gamma function is extended to the k-gamma function and the k-Riemann zeta function.MSC:33B15, 26D07, 26B25.
Jing Zhang, Huan-nan Shi
semanticscholar   +1 more source

Characterizations of minimal elements of upper support with applications in minimizing DC functions

open access: yesOpen Mathematics
In this study, we discuss on the problem of minimizing the differences of two non-positive valued increasing, co-radiant and quasi-concave (ICRQC) functions defined on XX (where XX is a real locally convex topological vector space).
Mirzadeh Somayeh   +2 more
doaj   +1 more source

Hermite-Hadamard type inequalities for Wright-convex functions of several variables

open access: yes, 2014
We present Hermite--Hadamard type inequalities for Wright-convex, strongly convex and strongly Wright-convex functions of several variables defined on ...
Wasowicz, Sz., Śliwińska, D.
core   +2 more sources

On some inequalities equivalent to the Wright-convexity

open access: yes, 2015
In the present paper we establish some conditions and inequalities equivalent to the Wright-convexity. Mathematics subject classification (2010): 39B62, 26A51, 26B25.
A. Olbryś
semanticscholar   +1 more source

Another Converse of Jensen's Inequality [PDF]

open access: yes, 2009
We give the best possible global bounds for a form of discrete Jensen’s inequality.
Simic, Slavko
core  

Certain Inequalities for Convex Functions

open access: yes, 2015
This is a review paper on some new inequalities for convex functions of one and several variables. The most important result presented for convex functions of one variable is the extension of Jensen’s inequality to affine combinations.
Zlatko Pavić
semanticscholar   +1 more source

Characterizations of bivariate conic, extreme value, and Archimax copulas

open access: yesDependence Modeling, 2017
Based on a general construction method by means of bivariate ultramodular copulas we construct, for particular settings, special bivariate conic, extreme value, and Archimax copulas. We also show that the sets of copulas obtained in this way are dense in
Saminger-Platz Susanne   +3 more
doaj   +1 more source

A universal bound on the variations of bounded convex functions [PDF]

open access: yes, 2015
Given a convex set $C$ in a real vector space $E$ and two points $x,y\in C$, we investivate which are the possible values for the variation $f(y)-f(x)$, where $f:C\longrightarrow [m,M]$ is a bounded convex function. We then rewrite the bounds in terms of
Kwon, Joon
core  

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