Results 11 to 20 of about 12,972,182 (333)

AN EXTREMAL PROBLEM FOR UNIVALENT FUNCTIONS [PDF]

open access: yesAnalele Universităţii Constantin Brâncuşi din Târgu Jiu : Seria Economie, 2010
Let S be the class of functions f(z)=z+a2z 2 …, f(0)=0, f′(0)=1 which are regular and univalent in the unit disk |z| x the equation φ′( x)=0 does not have real roots. Since S is a compact class, there exists x .
Miodrag IOVANOV
doaj   +4 more sources

Bilevel programs with extremal value function: global optimality [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
For a bilevel program with extremal value function, a necessary and sufficient condition for global optimality is given, which reduces the bilevel program to a max-min problem with linked constraints. Also, for the case where the extremal value function
Abdelmalek Aboussoror   +2 more
doaj   +2 more sources

Theorem on the Structure of the Fractionally Linear Functional Extremal Function [PDF]

open access: yesMathematics, 2023
The paper proves a theorem about the structure of the distribution function on which the extremum of the fractionally linear functional is reached in the presence of an uncountable number of linear constraints.
Victor Kashtanov   +2 more
doaj   +2 more sources

Entropy of an extremal electrically charged thin shell and the extremal black hole [PDF]

open access: yesPhysics Letters B, 2015
There is a debate as to what is the value of the entropy S of extremal black holes. There are approaches that yield zero entropy S=0, while there are others that yield the Bekenstein–Hawking entropy S=A+/4, in Planck units.
José P.S. Lemos   +2 more
doaj   +5 more sources

Extremal problems related to convexity [PDF]

open access: yesJournal of Inequalities and Applications, 2016
We consider the extremal problem of maximizing functions u in the class of real-valued biconvex functions satisfying a boundary condition ψ on a product of the unit ball with itself, with the ℓ p $\ell^{p}$ -norm. In 1986, Burkholder explicitly found the
Aimo Hinkkanen, Sineenuch Suwannaphichat
doaj   +2 more sources

The extremal function for unbalanced bipartite minors

open access: yesDiscrete Mathematics, 2003
We consider the question of what average degree forces a graph to have a K"s","t minor, for s fixed and t sufficiently large. In the case of s=2, we show that if t is sufficiently large and G is a graph with more than ((t+1)/2)(|G|-1) edges then G has a ...
J. Myers
exaly   +2 more sources

The Siciak-Zahariuta extremal function as the envelope of disc functionals [PDF]

open access: yes, 2005
We establish disc formulas for the Siciak-Zahariuta extremal function of an arbitrary open subset of complex affine space. This function is also known as the pluricomplex Green function with logarithmic growth or a logarithmic pole at infinity. We extend
F. Lárusson, R. Sigurdsson
semanticscholar   +3 more sources

On the existence of an extremal function for the Delsarte extremal problem

open access: yesAnalysis Mathematica
Abstract In the general setting of a locally compact Abelian group G, the Delsarte extremal problem asks for the supremum of integrals over the collection of continuous positive definite functions $$f \colon G \to \mathbb{R}$$ f :
exaly   +4 more sources

Sharp constant and extremal function for weighted Trudinger–Moser type inequalities in R2

open access: yesJournal of Mathematical Analysis and Applications, 2015
FRANCISCO Siberio Bezerra Albuquerque
exaly   +2 more sources

An estimate for the Siciak extremal function – Subanalytic geometry approach

open access: yesJournal of Mathematical Analysis and Applications, 2015
Rafał Pierzchała
exaly   +2 more sources

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