Results 21 to 30 of about 5,610 (306)

On extremal sets without coprimes [PDF]

open access: yes, 1994
Ahlswede R, Khachatrian LH. On extremal sets without coprimes. Acta Arithmetica.
Levon Khachatrian   +4 more
core   +2 more sources

An extremal problem on trees and database theory [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2005
We consider an extremal problem on labelled directed trees and applications to database theory. Among others, we will show explicit keysystems on an underlying set of size $n$, that cannot be represented by a database of less than $2^{n(1-c\cdot \log ...
Gyula O.H. Katona, Krisztián Tichler
doaj   +1 more source

Excluded subposets in the Boolean lattice [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2005
We are looking for the maximum number of subsets of an n-element set not containing 4 distinct subsets satisfying $A ⊂B, C ⊂B, C ⊂D$. It is proved that this number is at least the number of the $\lfloor \frac{n }{ 2}\rfloor$ -element sets times $1+\frac ...
Gyula O.H. Katona
doaj   +1 more source

Analytic solutions of transcendental equations with application to automatics

open access: yesArchives of Control Sciences, 2016
In the paper the extremal dynamic error x(τ) and the moment of time τ are considered. The extremal value of dynamic error gives information about accuracy of the system. The time τ gives information about velocity of transient.
Górecki Henryk, Zaczyk Mieczysław
doaj   +1 more source

Lupaş-type inequality and applications to Markov-type inequalities in weighted Sobolev spaces

open access: yesBulletin of Mathematical Sciences, 2021
Weighted Sobolev spaces play a main role in the study of Sobolev orthogonal polynomials. In particular, analytic properties of such polynomials have been extensively studied, mainly focused on their asymptotic behavior and the location of their zeros. On
Francisco Marcellán   +1 more
doaj   +1 more source

Asymptotically extremal polynomials with respect to varying weights and application to Sobolev orthogonality [PDF]

open access: yes, 2008
9 pages, no figures.-- MSC2000 code: 33C45.MR#: MR2431543 (2009g:41009)Zbl#: Zbl 1155.33006We study the asymptotic behavior of the zeros of a sequence of polynomials whose weighted norms, with respect to a sequence of weight functions, have the same $n ...
Díaz Mendoza, Carlos J.   +3 more
core   +1 more source

On an Extremal Problem for Poset Dimension [PDF]

open access: yesOrder, 2017
removed proof of Theorem 3 duplicating previous work; fixed typos and ...
Grzegorz Guspiel   +2 more
openaire   +3 more sources

A Minimization Algorithm for Limit Extremal Problems on Convex Compactum [PDF]

open access: yes, 2021
In an extremal problem, instead of f(x) one has a sequence f(n)(x) of functions approximating in some sense f(x) and on the basis of which one has to find an extremum of f(x), such problems are usually called limit extremal problems.
Deger, Ozkan
core   +1 more source

Decomposition method and its application to the extremal problems

open access: yesArchives of Control Sciences, 2016
In the article solution of the problem of extremal value of x(τ) is presented, for the n-th order linear systems. The extremum of x(τ) is considered as a function of the roots s1, s2, ... sn of the characteristic equation.
Górecki Henryk, Zaczyk Mieczysław
doaj   +1 more source

Extremal problems for completely positive maps

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1994
In this note, we study the faces of some convex subsets of CPc(A,B(ℋ))(the continuous completely positive linear maps from pro-C*-algebra A to B(ℋ)).
Mingze Yang
doaj   +1 more source

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