Results 71 to 80 of about 467 (143)
Polyhedral hyperbolic metrics on surfaces [PDF]
, 2018 Let S be a topologically finite surface, and g be a hyperbolic metric on S with a finite number of conical singularities of positive singular curvature, cusps and complete ends of infinite area. We prove that there exists a convex polyhedral surface P in
Fillastre, François
core
6j-symbols, hyperbolic structures and the Volume Conjecture
, 2007 We compute the asymptotical growth rate of a large family of $U_q(sl_2)$ $6j$-symbols and we interpret our results in geometric terms by relating them to volumes of hyperbolic truncated tetrahedra.
Francesco Costantino +5 more
core +6 more sources
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 +2 more
core
Filomat, 2016 In this paper we study fuzzy hyperideals of a fuzzy hyperring, we define and analyze two particular kinds of fuzzy hyperideals, which extend similar notions of ring context, namely prime fuzzy hyperideals and maximal fuzzy hyperideals. Moreover, we study the hyperideal transfer through a fuzzy hyperring homomorphism, particularly for prime ...
Maedeh Motameni +2 more
openaire +2 more sources
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
Multiplicative hyperring of fractions and coprime hyperideals
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017 In this paper we will introduce the notion of coprime hyperideals in multiplicative hyperrings and we will show some properties of them. Then we introduce the notion of hyperring of fractions generated by a multiplicative hyperring and then we will show ...
Ameri R., Kordi A., Hoskova-Mayerova S.
doaj +1 more source
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 +2 more
core
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2013 In this paper we introduce the notion of composition hyperring. We show that the composition structure of a composition hyperring is determined by a class of its strong multiendomorphisms.
Cristea Irina, Jančić-Rašović Sanja
doaj +1 more source
$\delta$-$r$-Hyperideals and $\phi$-$\delta$-$r$-Hyperideals of Commutative Krasner Hyperrings
, 2021 In this paper, our purpose is to define the expansion of $r$-hyperideals and extend this concept to $\phi$-$\delta$-$r$-hyperideal. Let $\Re$ be a commutative Krasner hyperring with nonzero identity. Given an expansion $\delta$ of hyperideals, a proper hyperideal $N$ of $\Re$ is called $\delta $-$r$-hyperideal if $a\cdot b\in N$ with $ann(a)=0$ implies
Xu, Peng +5 more
openaire +2 more sources