Results 21 to 30 of about 25,758 (195)

Nonintersecting Ryser Hypergraphs [PDF]

open access: yesSIAM Journal on Discrete Mathematics, 2020
8 pages, some corrections in the proof of Lemma 3.6, added more explanation in the appendix, and other minor ...
Bishnoi A., Pepe V.
openaire   +2 more sources

Cognitive Networks for Knowledge Modeling: A Gentle Introduction for Data- and Cognitive Scientists. [PDF]

open access: yesWiley Interdiscip Rev Cogn Sci
Cognitive network science helps organize associative knowledge—that is, the connections between concepts. These connections play a key role in cognitive processes such as language understanding and context interpretation, even though they are not obvious in language use.
Haim E, Stella M.
europepmc   +2 more sources

Pattern Hypergraphs [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2010
The notion of pattern hypergraph provides a unified view of several previously studied coloring concepts. A pattern hypergraph $H$ is a hypergraph where each edge is assigned a type $\Pi_i$ that determines which of possible colorings of the edge are proper. A vertex coloring of $H$ is proper if it is proper for every edge.
Dvořák, Zdeněk   +3 more
openaire   +2 more sources

Oriented hypergraphs: Balanceability

open access: yesDiscrete Mathematics, 2022
An oriented hypergraph is an oriented incidence structure that extends the concepts of signed graphs, balanced hypergraphs, and balanced matrices. We introduce hypergraphic structures and techniques that generalize the circuit classification of the signed graphic frame matroid to any oriented hypergraphic incidence matrix via its locally-signed-graphic
Lucas J. Rusnak   +4 more
openaire   +2 more sources

Regular Bipolar Single Valued Neutrosophic Hypergraphs [PDF]

open access: yesNeutrosophic Sets and Systems, 2016
In this paper, we define the regular and totally regular bipolar single valued neutrosophic hypergraphs, and discuss the order and size along with properties of regular and totally regular bipolar single valued neutrosophic hypergraphs. We extend work on
Muhammad Aslam Malik   +3 more
doaj   +1 more source

Elementary definability of the class of universal hypergraphic automata in the class of semigroups [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2022
Hypergraphic automata are automata, state sets and output symbol sets of which are hypergraphs, being invariant under actions of transition and output functions. Universally attracting objects in the category of hypergraphic automata are called universal
Molchanov, Vladimir Aleksandrovich   +1 more
doaj   +1 more source

Complex hypergraphs

open access: yesPhysical Review E, 2023
Providing an abstract representation of natural and human complex structures is a challenging problem. Accounting for the system heterogenous components while allowing for analytical tractability is a difficult balance. Here I introduce complex hypergraphs (chygraphs), bringing together concepts from hypergraphs, multi-layer networks, simplicial ...
openaire   +3 more sources

Hypergraphs in m-Polar Fuzzy Environment

open access: yesMathematics, 2018
Fuzzy graph theory is a conceptual framework to study and analyze the units that are intensely or frequently connected in a network. It is used to study the mathematical structures of pairwise relations among objects. An m-polar fuzzy (mF, for short) set
Muhammad Akram, Gulfam Shahzadi
doaj   +1 more source

Turánnical hypergraphs [PDF]

open access: yesRandom Structures & Algorithms, 2012
AbstractThis paper is motivated by the question of how global and dense restriction sets in results from extremal combinatorics can be replaced by less global and sparser ones. The result we consider here as an example is Turán's theorem, which deals with graphs G = ([n],E) such that no member of the restriction set \documentclass{article} \usepackage ...
Allen, Peter   +3 more
openaire   +3 more sources

Coloring d-Embeddable k-Uniform Hypergraphs [PDF]

open access: yes, 2014
This paper extends the scenario of the Four Color Theorem in the following way. Let H(d,k) be the set of all k-uniform hypergraphs that can be (linearly) embedded into R^d.
Heise, Carl Georg   +3 more
core   +1 more source

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