Results 81 to 90 of about 754 (158)

On Intra-Regular Semihypergroups Through Intuitionistic Fuzzy Sets [PDF]

, 2013
The notion of intuitionistic fuzzy sets was introduced by Atanassov as ageneralization of the notion of fuzzy sets. In this paper, using Atanassov idea, wegive some properties of intuitionistic fuzzy hyperideals and intuitionistic fuzzy bihyperidealsin a
Jani DINE, Kostaq HILA
core  

Existence and uniqueness theorem for convex polyhedral metrics on compact surfaces [PDF]

, 2010
We state that any constant curvature Riemannian metric with conical singularities of constant sign curvature on a compact (orientable) surface $S$ can be realized as a convex polyhedron in a Riemannian or Lorentzian) space-form.
Fillastre, François
core  

Infinitesimal rigidity of a compact hyperbolic 4-orbifold with totally geodesic boundary

, 2008
Kerckhoff and Storm conjectured that compact hyperbolic n-orbifolds with totally geodesic boundary are infinitesimally rigid when n>3. This paper verifies this conjecture for a specific example based on the 4-dimensional hyperbolic 120-cell.Comment: 9 ...
Calabi, Coxeter, Garland, Peter A Storm, Ratcliffe, Tarik Aougab, Vinberg   +6 more
core   +1 more source

On Some Hyperideals in Ordered Semihypergroups

Journal of New Theory, 2019
In this paper, we study orderedhyperideals in ordered semihypergroups. Also, we study (m, n)-regular orderedsemihypergroups in terms of ordered (m, n)-hyperideals. Furthermore, we obtainsome ideal theoretic results in ordered semihypergroups.
Abul Basar, Shahnawaz ALİ, Mohammad Yahya Abbasi, Bhavanari SATYANARAYANA, Poonam Kumar SHARMA   +4 more
openalex   +4 more sources

Completely simple and regular semi hypergroups [PDF]

, 2012
In this paper the notion of simple and completely simple semi hypergroups are introduced. Basic properties of these algebraic structures are considered. Some methods for constructing new kinds of these hyperstructures are presented.
Jafarabadi, Hossein Mousa, Molaei, Mohammad Reza, Sarmin, Nor Haniza   +2 more
core  

Height of prime hyperideals in Krasner hyperrings

Filomat, 2017
Extending the notion of dimension of a hyperring, we introduce the concept of height of a prime hyperideal of a hyperring, similarly as in ring theory, and we present some basic properties and relations with the dimension notion. In the second part of the article we illustrate some results concerning the height of prime hyperideals in ...
Cristea, Irina Elena, Bordbar, Hashem
openaire   +3 more sources

Hyperideal-based zero-divisor graph of the general hyperring $ \mathbb{Z}_{n} $

AIMS Mathematics
The aim of this paper is to introduce and study the concept of a hyperideal-based zero-divisor graph associated with a general hyperring. This is a generalized version of the zero-divisor graph associated with a commutative ring.
Mohammad Hamidi, Irina Cristea
doaj   +1 more source

The L-ordered L-semihypergroups

Open Mathematics, 2020
This study pursues an investigation on L-semihypergroups equipped with an L-order. First, the concept of L-ordered L-semihypergroups is introduced by L-posets and L-semihypergroups, and some related results are obtained.
Su Shuhua, Liu Fuyao, Yang Shuqun
doaj   +1 more source

Réalisation de métriques sur les surfaces compactes [PDF]

, 2006
Un polyèdre fuchsien de l'espace hyperbolique est une surface polyèdrale invariante sous l'action d'un groupe fuchsien d'isométries (c.a.d. un groupe d'isométries qui laissent globalement invariante une surface totalement géodésique et sur laquelle il ...
Colbois, Bruno, Fillastre, François, Schlenker, Jean-Marc   +2 more
core  

Basic notions and properties of ordered semihyperrings [PDF]

Categories and General Algebraic Structures with Applications, 2016
In this paper, we introduce the concept of semihyperring $(R,+,cdot)$ together with a suitable partial order $le$. Moreover, we introduce and study hyperideals in ordered semihyperrings. Simple ordered semihyperrings are defined and its characterizations
B. Davvaz, S. Omidi
doaj