Results 41 to 50 of about 41,670 (161)

n–ary hyperstructures constructed from binary quasi–ordered semigroups

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
Based on works by Davvaz, Vougiouklis and Leoreanu-Fotea in the field of n–ary hyperstructures and binary relations we present a construction of n–ary hyperstructures from binary quasi-ordered semigroups.
Novák Michal
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Partially homogeneous partially ordered sets

Journal of Combinatorial Theory, Series A, 1993
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Saracino, Dan, Wood, Carol
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Birkhoff's order-convergence in partially ordered sets

Topology and its Applications, 2016
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Sun, Tao, Li, Qingguo, Guo, Lankun
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Existence and uniqueness of positive solutions to higher-order nonlinear fractional differential equation with integral boundary conditions

Electronic Journal of Differential Equations, 2012
In this article, we consider the nonlinear fractional order three-point boundary-value problem $$displaylines{ D_{0+}^{alpha} u(t) + f(t,u(t))=0, quad 0 < t < 1,cr u(0) = u'(0) = dots = u^{(n-2)}(0)=0, quad u^{(n-2)}(1) = int_0^eta u(s)ds, }$$
Chenxing Zhou
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Shaprly transitive partially ordered sets

Discrete Mathematics, 1986
If \(\Lambda\) is a p.o. set, \(A=Aut(\Lambda,\leq)\) will denote its group of automorphisms. If for each \(\lambda_ 1,\lambda_ 2\in \Lambda\) there is a unique \(a\in A\) such that \(\lambda_ 1a=\lambda_ 2\), we say that \(\Lambda\) is sharply transitive. It is easily seen that any sharply transitive p.o. set is connected or has just 2 elements.
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Asymptotic enumeration of partially ordered sets [PDF]

Pacific Journal of Mathematics, 1980
The author define the entropy function S( ρ)=Lim n- ∞ 2n −2 lnN (n, ρ ), where N(n, ρ ) is the number of distinct partial order relations which may be defined on a set of n elements such that a fraction ρ of the possible n(n−1)/2 pairs are comparable.We derive upper bounds to S(ρ) to show that S(ρ) .699.
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Positive Solutions of Nonlinear Fractional Differential Equations with Integral Boundary Value Conditions

Abstract and Applied Analysis, 2012
We investigate the existence and uniqueness of positive solutions of the following nonlinear fractional differential equation with integral boundary value conditions, , , where , and is the Caputo fractional derivative and is a continuous function ...
J. Caballero, I. Cabrera, K. Sadarangani
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Unique Solution of a Coupled Fractional Differential System Involving Integral Boundary Conditions from Economic Model

Abstract and Applied Analysis, 2013
We study the existence and uniqueness of the positive solution for the fractional differential system involving the Riemann-Stieltjes integral boundary conditions , , , , , and , where , , and and are the standard Riemann-Liouville derivatives, and ...
Rui Li, Haoqian Zhang, Hao Tao
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Set-theoretic Analysis of Nominative Data [PDF]

Computer Science Journal of Moldova, 2015
In the paper we investigate the notion of nominative data that can be considered as a general mathematical model of data used in computing systems. The main attention is paid to flat nominative data called nominative sets.
Volodymyr G. Skobelev, Ievgen Ivanov, Mykola Nikitchenko   +2 more
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A remark on the extension of the concept of incidence algebras to nonlocally finite partially ordered sets

International Journal of Mathematics and Mathematical Sciences, 2004
An incidence algebra of a nonlocally finite partially ordered set Q is a very rare concept, perhaps nonexistent. In this note, we will attempt to construct such an algebra.
Boniface I. Eke
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