Results 11 to 20 of about 305 (130)

An Overview of Topological and Fuzzy Topological Hypergroupoids [PDF]

open access: yesRatio Mathematica, 2017
On a hypergroup, one can define a topology such that the hyperoperation is pseudocontinuous or continuous. This concepts can be extend to the fuzzy case and a connection between the classical and the fuzzy (pseudo)continuous hyperoperations can be given.
Sarka Mayerova
doaj   +4 more sources

Algebraic and geometric automorphisms of hypergroupoids

open access: yesLe Matematiche, 1998
Two concepts of automorphism of a hypergroupoid are introduced; the first one preserve the algebraic structure of a hypergroupoid, the second one preserve the geometric structure that one can associate naturally to a hypergroupoid.
Giuseppe Gentile
doaj   +5 more sources

Atanassov’s intuitionistic fuzzy index of hypergroupoids

open access: yesRatio Mathematica, 2012
In this work we introduce the concept of Atanassov’s intuitionistic fuzzy index of a hypergroupoid based on the notion of intuitionistic fuzzy grade of a hypergroupoid.
Mohsen Asghari-Larimi, Irina Cristea
doaj   +3 more sources

The hypergroupoid of boundary conditions for local quantum observables [PDF]

open access: yes, 2016
We review the definition of hypergroups by Sunder, and we associate a hypergroup to a type III subfactor $N\subset M$ of finite index, whose canonical endomorphism $\gamma\in\mathrm{End}(M)$ is multiplicity-free.
M. Bischoff, K. Rehren
semanticscholar   +2 more sources

On the g-hypergroupoids associated with g-hypergraphs

open access: yesFilomat, 2017
In this paper, we associate a partial g-hypergroupoid with a given g-hypergraph and analyze the properties of this hyperstructure. We prove that a g-hypergroupoid may be a commutative hypergroup without being a join space. Next, we define diagonal direct product of g-hypergroupoids.
Farshi, Mehdi   +2 more
openaire   +3 more sources

The associated hyperringoid to a Krasner hyperring

open access: yesJournal of Taibah University for Science, 2018
“Ends Lemma” is used to construct a hypergroupoid from a (quasi) partially ordered groupoid. But this lemma does not work well for creating a hyperringoid from a (partially) ordered ringoid.
H. Mirabdollahi   +2 more
doaj   +2 more sources

(Intuitionistic) Fuzzy Grade of a Hypergroupoid: A Survey of Some Recent Researches

open access: yesRatio Mathematica, 2012
This paper aims to present a short survey on two numerical functions determined by a hypergroupoid, called the fuzzy grade and the intuitionistic fuzzy grade of a hypergroupoid.
Irina Cristea
doaj   +2 more sources

Contributo alle iperstrutture matroidali

open access: yesLe Matematiche, 1997
In this paper we continue the investigation of matroidal hyperstructures, introduced in [8], [9], [15], [17], [22]. In the first section, we define the sub-hypergroupoid [A] generated by a subset A of an hypergroupoid (H, •).
Domenico Freni
doaj   +2 more sources

Applicazioni (h,A)-lineari omomorfismi di M_A-ipergruppoidi

open access: yesLe Matematiche, 1999
In the papers [9], [10] we introduced and studied M_λ -hypergroupoids; also, we obtained some results on the automorphism group of a G_ λ -hypergroupoid.
Domenico Freni
doaj   +1 more source

M_λ ipergruppoidi matroidali. Applicazioni λ-lineari e automorfismi di M_λ-ipergruppoidi

open access: yesLe Matematiche, 1998
In this paper we forward in the investigation of the matroidal M_λ -hypergrupoids introduced in [13]. We give necessary and sufficient conditions for such hypergrupoid to be matroidal; moreover, we find its cardinality and we analyse the properties of ...
Domenico Freni
doaj   +2 more sources

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