Results 31 to 40 of about 3,929,149 (297)

Topological Bihyperbolic Modules

open access: yesCommunications in Advanced Mathematical Sciences, 2021
The aim of this article is introducing and researching hyperbolic modules, bihyperbolic modules, topological hyperbolic modules, and topological bihyperbolic modules.
Merve Bilgin, Soley Ersoy
doaj   +1 more source

Hyperbolic Space for Tourists

open access: yesJournal of Humanistic Mathematics, 2013
We discuss how a creature accustomed to Euclidean space would fare in a world of hyperbolic or spherical geometry, and conversely. Various optical illusions and counterintuitive experiences arise, which can be explicated mathematically using plane models of these geometries.
openaire   +4 more sources

The Half-Space Model of Pseudo-hyperbolic Space

open access: yes, 2022
24 pages, 6 figures. Added Lemma 6.2 and additional details in the proofs of Propositions 2.5 and 5.1; other minor improvements and ...
Seppi A., Trebeschi E.
openaire   +2 more sources

Quasi-Isometries Need Not Induce Homeomorphisms of Contracting Boundaries with the Gromov Product Topology

open access: yesAnalysis and Geometry in Metric Spaces, 2016
We consider a ‘contracting boundary’ of a proper geodesic metric space consisting of equivalence classes of geodesic rays that behave like geodesics in a hyperbolic space.We topologize this set via the Gromov product, in analogy to the topology of the ...
Cashen Christopher H.
doaj   +1 more source

Translation-Based Embeddings with Octonion for Knowledge Graph Completion

open access: yesApplied Sciences, 2022
Knowledge representation learning achieves the automatic completion of knowledge graphs (KGs) by embedding entities into continuous low-dimensional vector space.
Mei Yu   +7 more
doaj   +1 more source

Boundaries of hyperbolic metric spaces [PDF]

open access: yesPacific Journal of Mathematics, 2005
We investigate the relationship between the metric boundary and the Gromov boundary of a hyperbolic metric space. We show that the Gromov boundary is a quotient topological space of the metric boundary, and that therefore a word-hyperbolic group has an amenable action on the metric boundary of its Cayley graph.
Webster, Corran, Winchester, Adam
openaire   +3 more sources

Normal automorphisms of relatively hyperbolic groups

open access: yes, 2010
An automorphism of a group G is normal if it fixes every normal subgroup of G setwise. We give an algebraic description of normal automorphisms of relatively hyperbolic groups.
D. Osin   +3 more
core   +1 more source

Convex regions in the plane and their domes [PDF]

open access: yes, 2006
We make a detailed study of the relation of a euclidean convex region $\Omega \subset \mathbb C$ to $\mathrm{Dome} (\Omega)$. The dome is the relative boundary, in the upper halfspace model of hyperbolic space, of the hyperbolic convex hull of the ...
Markovic, V.   +3 more
core   +1 more source

Circulating microRNA signatures of cachexia and cancer in Canis familiaris as a comparative oncology model for human disease

open access: yesMolecular Oncology, EarlyView.
Circulating microRNAs as biomarkers of cachexia and sex‐specific cancer in senior dogs. In 25 client‐owned dogs, four circulating miRNAs (miR‐15a, miR‐15b, miR‐16, miR‐140) were downregulated in cachexia, with miR‐16 the strongest individual biomarker (AUC = 0.899).
Soon‐Seok Park   +6 more
wiley   +1 more source

Ball Packings in Hyperbolic Space

open access: yes, 2023
In hyperbolic space density cannot be defined by a limit as we define it in Euclidean space. We describe the local density bounds for sphere packings and we discuss the different attempts to define optimal arrangements in hyperbolic space.
Tóth, Gábor Fejes   +2 more
openaire   +2 more sources

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