4 citations · 4 across the 2 of their papers we have counts for
3 papers
On unimodular tournaments
Wiam Belkouche, Abderrahim Boussaïri, Abdelhak Chaïchaâ +1
A tournament is unimodular if the determinant of its skew-adjacency matrix is . In this paper, we give some properties and constructions of unimodular tournaments. A unimodular…
Matricial characterization of tournaments with maximum number of diamonds
Wiam Belkouche, Abderrahim Boussaïri, Soufiane Lakhlifi +1
A diamond is a -tournament which consists of a vertex dominating or dominated by a -cycle. Assuming the existence of skew-conference matrices, we give a complete characteriza…
An exact extremal result for tournaments and 4-uniform hypergraphs
Wiam Belkouche, Abderrahim Boussaïri, Soufiane Lakhlifi +1
In this paper, we address the following problem due to Frankl and Füredi (1984). What is the maximum number of hyperedges in an -uniform hypergraph with vertices, such that…