Results 51 to 60 of about 4,302,979 (374)

Heterogeneous diffusion, viscosity, and the Stokes-Einstein relation in binary liquids. [PDF]

open access: yesPhysical Review E, 2016
We investigate the origin of the breakdown of the Stokes-Einstein relation (SER) between diffusivity and viscosity in undercooled melts. A binary Lennard-Jones system, as a model for a metallic melt, is studied by molecular dynamics.
H. Schober, H. Peng
semanticscholar   +1 more source

On the properties of contact binary stars

open access: yes, 2004
A catalogue of light curve solutions of contact binary stars has been compiled. It contains the results of 159 light curve solutions. Properties of contact binary stars were studied by using the catalogue data. As it is well known since Lucy's (1968a,b)
Binnendijk   +22 more
core   +1 more source

Normal forms for binary relations [PDF]

open access: yesTheoretical Computer Science, 2006
AbstractWe consider the representable equational theory of binary relations, in a language expressing composition, converse, and lattice operations. By working directly with a presentation of relation expressions as graphs we are able to define a notion of reduction which is confluent and strongly normalizing and induces a notion of computable normal ...
Dougherty, Daniel J.   +1 more
openaire   +1 more source

Ideals and Filters on Neutrosophic Topologies Generated by Neutrosophic Relations

open access: yesAxioms
Recently, Milles and Hammami presented and studied the concept of a neutrosophic topology generated by a neutrosophic relation. As a continuation in the same direction, this paper studies the concepts of neutrosophic ideals and neutrosophic filters on ...
Ravi P. Agarwal   +4 more
doaj   +1 more source

Almost Boyd-Wong Type Contractions under Binary Relations with Applications to Boundary Value Problems

open access: yesAxioms, 2023
This article is devoted to investigating the fixed point theorems for a new contracitivity contraction, which combines the idea involved in Boyd-Wong contractions, strict almost contractions and relational contractions.
Amal F. Alharbi, Faizan Ahmad Khan
doaj   +1 more source

Operations on binary relations

open access: yesDiscrete Mathematics, 1978
AbstractThe effects of five basic operations (asymmetrization, complementation, dualization, symmetrization, transitive closure) on binary relations are examined. Identifies between compound operations are developed (e.g. the symmetric part of the transitive closure of the complement of the transitive closure equals the transitive closure of the ...
openaire   +1 more source

On the Structure of Acyclic Binary Relations

open access: yes, 2018
We investigate the structure of acyclic binary relations from different points of view. On the one hand, given a nonempty set we study real-valued bivariate maps that satisfy suitable functional equations, in a way that their associated binary relation is acyclic. On the other hand, we consider acyclic directed graphs as well as their representation by
Rodríguez Alcantud, José Carlos   +4 more
openaire   +4 more sources

occumb: An R package for site occupancy modeling of eDNA metabarcoding data

open access: yesPopulation Ecology, EarlyView.
This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley   +1 more source

Relational Almost (ϕ,ψ)-Contractions and Applications to Nonlinear Fredholm Integral Equations

open access: yesAxioms
This paper deals with the fixed-point findings under relational strict almost (ϕ,ψ)-contraction. Our findings complement and strengthen prevailing results.
Fahad M. Alamrani   +5 more
doaj   +1 more source

Ample Spectrum Contractions and Related Fixed Point Theorems

open access: yesMathematics, 2019
Simulation functions were introduced by Khojasteh et al. as a method to extend several classes of fixed point theorems by a simple condition. After that, many researchers have amplified the knowledge of such kind of contractions in several ways.
Antonio Francisco Roldán López de Hierro   +1 more
doaj   +1 more source

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