Results 41 to 50 of about 87 (83)

Shortest paths on polymatroids and hypergraphic polytopes [PDF]

open access: yes
Base polytopes of polymatroids, also known as generalized permutohedra, are polytopes whose edges are parallel to a vector of the form \(\mathbf{e}_i - \mathbf{e}_j\), where the \(\{\mathbf{e}_i\}_{i\in [n]}\) are the canonical basis vectors of \(\mathbb{
Cardinal, Jean, Steiner, Raphael
core   +1 more source

EIGENVALUES AND LINEAR QUASIRANDOM HYPERGRAPHS

open access: yesForum of Mathematics, Sigma, 2015
Let $p(k)$ denote the partition function of $k$. For each $k\geqslant 2$, we describe a list of $p(k)-1$ quasirandom properties that a $k$-uniform hypergraph can have. Our work connects previous notions on linear hypergraph quasirandomness by Kohayakawa,
JOHN LENZ, DHRUV MUBAYI
doaj   +1 more source

Parsimonious cluster systems

open access: yes
Overlapping clustering, Parsimony, Phylogenetic trees, Dissimilarities, 05C65, 05C05, 03G10,
Alain Gély, François Brucker
core   +1 more source

Representing Higher-Order Networks: A Survey of Graph-Based Frameworks

open access: yes
Many real-world phenomena are naturally modeled by graphs and networks. However, classical graph models are often limited to pairwise interactions and may not adequately capture the richer structures that arise in practice.
Fujita, T., Smarandache, Florentin
core   +3 more sources

Sidorenko hypergraphs and random Turán numbers

open access: yes
Let \(\mathrm{ex}(G_{n,p}^r,F)\) denote the maximum number of edges in an \(F\)-free subgraph of the random \(r\)-uniform hypergraph \(G_{n,p}^r\), and let \[s(F):=\sup\{s: \exists H, t_F(H)=t_{K_r^r}(H)^{s+e(F)}›0\}.\] Following recent work of Conlon ...
Spiro, Sam, Nie, Jiaxi
core   +1 more source

Random matchings in linear hypergraphs

open access: yesForum of Mathematics, Sigma
For a given hypergraph H and a vertex v∈V(H) $v\in V(H)$ v element of upper V left parenthesis upper H right parenthesis , consider a random matching M chosen uniformly from the set of all matchings in H. $H.$ upper H period In 1995, $1995,$
Hyunwoo Lee
doaj   +1 more source

Central hubs prediction for bio networks by directed hypergraph - GA with validation to COVID-19 PPI. [PDF]

open access: yesPattern Recognit Lett, 2022
Gopalakrishnan S   +4 more
europepmc   +1 more source

Finite Hypergraph Families with Rich Extremal Turán Constructions via Mixing Patterns

open access: yesForum of Mathematics, Sigma
We prove that, for any finite set of minimal r-graph patterns, there is a finite family $\mathcal F$ of forbidden r-graphs such that the extremal Turán constructions for $\mathcal F$ are precisely the maximum r-graphs obtainable from mixing
Xizhi Liu, Oleg Pikhurko
doaj   +1 more source

Extremal, enumerative and probabilistic results on ordered hypergraph matchings

open access: yesForum of Mathematics, Sigma
An ordered r-matching is an r-uniform hypergraph matching equipped with an ordering on its vertices. These objects can be viewed as natural generalisations of r-dimensional orders.
Michael Anastos   +3 more
doaj   +1 more source

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