Mohamed Zaidi

activity

20152020

most cited3-uniform hypergraphs: modular decomposition and realization by tournaments

2 citations · 2 across the 4 of their papers we have counts for

collaborators

5 papers

math.CO2020

Critical 3-hypergraphs (detailed version)

Abderrahim Boussairi, Brahim Chergui, Pierre Ille +1

Given a 3-hypergraph $H$ , a subset $M$ of $V (H)$ is a module of $H$ if for each $e \in E (H)$ such that $e \cap M \neq = \emptyset$ and $e ∖ M \neq = \emptyset$ , there exists $m \in M$ …

math.CO2019

Matricial characterization of tournaments with maximum number of diamonds

Wiam Belkouche, Abderrahim Boussaïri, Soufiane Lakhlifi +1

A diamond is a $4$ -tournament which consists of a vertex dominating or dominated by a $3$ -cycle. Assuming the existence of skew-conference matrices, we give a complete characteriza…

math.CO2018★ 2 cited

3-uniform hypergraphs: modular decomposition and realization by tournaments

Abderrahim Boussaïri, Brahim Chergui, Pierre Ille +1

Let $H$ be a 3-uniform hypergraph. A tournament $T$ defined on $V (T) = V (H)$ is a realization of $H$ if the edges of $H$ are exactly the 3-element subsets of $V (T)$ that induce 3-cyc…

math.CO2016

Skew-signings of positive weighted digraphs

Kawtar Attas, Abderrahim Boussaïri, Mohamed Zaidi

An arc-weighted digraph is a pair $(D, ω)$ where $D$ is a digraph and $ω$ is an \emph{arc-weight function} that assigns\ to each arc $uv$ of $D$ a nonzero real number $ω (uv)$ . Given…

math.CO2015

About the spectra of a real nonnegative matrix and its signings

Kawtar Attas, Abderrahim Boussaïri, Mohamed Zaidi

For a real matrix $M$ , we denote by $s p (M)$ the spectrum of $M$ and by $∣ M ∣$ its absolute value, that is the matrix obtained from $M$ by replacing each entry…