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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.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…