Results 131 to 140 of about 730,755 (216)

Hypergraph: A Unified and Uniform Definition with Application to Chemical Hypergraph and More

open access: yes
The conventional definition of hypergraph has two major issues: (1) there is not a standard definition of directed hypergraph and (2) there is not a formal definition of nested hypergraph.
Chang, Daniel T.
core  

Fuzzy Hypergraph Clustering via Higher-Order Modularity Maximization

open access: yesMathematics
Conventional clustering methods mainly characterize cluster structures using geometric proximity or pairwise similarities, which may be insufficient for data with complex higher-order dependencies.
Yichen Sun   +4 more
doaj   +1 more source

Online matching on 3-uniform hypergraphs

open access: yesMathematical Programming
Abstract The online matching problem was introduced by Karp, Vazirani and Vazirani (STOC 1990) on bipartite graphs with vertex arrivals. It is well-known that the optimal competitive ratio is $$1-1/e$$
S.J. Borst (Sander)   +2 more
openaire   +7 more sources

Recognizing the P 4-structure of claw-free graphs and a larger graph class

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2002
The P 4-structure of a graph G is a hypergraph H on the same vertex set such that four vertices form a hyperedge in H whenever they induce a P 4 in G.
Luitpold Babel   +2 more
doaj  

The Ramsey number for hypergraph cycles, I.

open access: yes, 2005
Let Cn denote the 3-uniform hypergraph loose cycle, that is the hypergraph with vertices v1,..., vn and edges v1v2v3, v3v4v5, v5v6v7,..., vn−1vnv1. We prove that every red-blue colouring of the edges of the complete 3-uniform hypergraph with N vertices ...
M. Simonovits   +5 more
core  

Maximum Packing of λ-Fold Complete 3-Uniform Hypergraph with a Special Tetrahedron

open access: yes
Let Kv(3)=(V,E) be the complete 3-uniform hypergraph, where the vertex set is V={x1,x2,⋯,xv}, in which the edge set E is of all triples. Let ST denote the special tetrahedron with four edges, where each edge contains three vertices of degree 2.
Yuzhe Zhu, Hongtao Zhao
core   +1 more source

HYPERGRAPH DAN BLOCK DESIGN

open access: yes
Suatu hypergraph didefinisikan sebagai pasangan himpunan ( , ) di mana = * 1, 2, … , + adalah himpunan berhingga dari n vertices dan = * | ⊆ V, = 1,2, … , + adalah himpunan hyperedge.
SAPUTRA, GILANG ANDI JAYA   +2 more
core   +1 more source

An infinite family of connected 1-factorisations of complete 3-uniform hypergraphs

open access: yes
A connected 1-factorisation is a 1-factorisation of a hypergraph for which the union of each pair of distinct 1-factors is a connected hypergraph. A uniform 1-factorisation is a 1-factorisation of a hypergraph for which the union of each pair of distinct
Puskas, Anna   +2 more
core   +1 more source

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