3 papers
math.CO2020
Critical 3-hypergraphs (detailed version)
Abderrahim Boussairi, Brahim Chergui, Pierre Ille +1
Given a 3-hypergraph , a subset of is a module of if for each such that and , there exists …
math.CO2019
On the spectral reconstruction problem for digraphs
Edward Bankoussou-mabiala, Abderrahim Boussaïri, Abdelhak Chaïchaâ +2
The idiosyncratic polynomial of a graph with adjacency matrix is the characteristic polynomial of the matrix , where is the identity matrix and is th…
math.CO2016
A transformation that preserves principal minors of skew-symmetric matrices
Abderrahim Boussaïri, Brahim Chergui
Our motivation comes from the work of Engel and Schneider (1980). Their main theorem implies that two symmetric matrices have equal corresponding principal minors of all orders if…