Results 41 to 50 of about 569,019 (209)

Impact of Stellar Dynamics on the Frequency of Giant Planets in Close Binaries [PDF]

open access: yes, 2006
Hostile tidal forces may inhibit the formation of Jovian planets in binaries with semimajor axes of ≾50 AU, binaries that might be called "close" in this context. As an alternative to in situ planet formation, a binary can acquire a giant planet when one
Muterspaugh, Matthew, Pfahl, Eric
core   +2 more sources

Relation-theoretic metrical coincidence and common fixed point theorems under nonlinear contractions

open access: yesApplied General Topology, 2018
In this paper, we prove coincidence and common fixed points results under nonlinear contractions on a metric space equipped with an arbitrary binary relation.
Md Ahmadullah   +2 more
doaj   +1 more source

Fixed Point Theorems for Nonexpansive Mappings under Binary Relations

open access: yesMathematics, 2021
In the present article, we establish relation-theoretic fixed point theorems in a Banach space, satisfying the Opial condition, using the R-Krasnoselskii sequence. We observe that graphical versions (Fixed Point Theory Appl.
Aftab Alam   +3 more
doaj   +1 more source

Ordinal notions of submodularity [PDF]

open access: yes, 2008
We consider several ordinal formulations of submodularity, defined for arbitrary binary relations on lattices. Two of these formulations are essentially due to Kreps [Kreps, D.M., 1979.
Chambers, Christopher P.   +1 more
core   +2 more sources

Compressed Data Structures for Binary Relations in Practice

open access: yesIEEE Access, 2020
Binary relations are commonly used in Computer Science for modeling data. In addition to classical representations using matrices or lists, some compressed data structures have recently been proposed to represent binary relations in compact space, such ...
Carlos Quijada Fuentes   +3 more
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

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

On binary relations without non-identical endomorphisms

open access: yes, 2000
On every set A there is a rigid binary relation, i.e. such a relation R that there is no homomorphism (A,R)->(A,R) except the identity (Vopenka et al. [1965]). We state two conjectures which strengthen this theorem.
Tyszka, Apoloniusz
core   +1 more source

Some fixed point theorems for (CAB)-contractive mappings and related results [PDF]

open access: yesMathematica Moravica, 2015
In this paper, we introduced the concept of (CAB)-contractive mappings and provide sufficient conditions for the existence and uniqueness of a fixed point for such class of generalized nonlinear contractive mappings in metric spaces and several ...
Ansari Hojat Arslan   +2 more
doaj  

Binary Relations as a Foundation of Mathematics [PDF]

open access: yes, 2007
We describe a theory for binary relations in the Zermelo-Fraenkel style. We choose for ZFCU, a variant of ZFC Set theory in which the Axiom of Foundation is replaced by an axiom allowing for non-wellfounded sets.
Kuper, J.
core   +1 more source

Home - About - Disclaimer - Privacy