Brahim Chergui

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2 papers · 1 filter

math.CO2016

A matrix description of weakly bipartitive and bipartitive families

Edward Bankoussou-mabiala, Abderrahim Boussaïri, Abdelhak Chaïchaâ +1

The notions of weakly bipartitive and bipartitive families were introduced by Montgolfier (2003) as a general tool for studying some decomposition of graphs and other combinatorial…

math.CO2014

Skew-symmetric matrices and their principal minors

A. Boussairi, B. Chergui

Let $V$ be a nonempty finite set and $A = (a_{ij})_{i, j \in V}$ be a matrix with entries in a field $K$ . For a subset $X$ of $V$ , we denote by $A [X]$ the submatrix of $A$ hav…