Partially critical 2-structures

Houmem Belkhechine, Imed Boudabbous, Pierre Ille

A 2-structure $\sigma$ consists of a vertex set $V(\sigma )$ and of an equivalence relation ${\equiv }_{\sigma }$ defined on $(V(\sigma )\times V(\sigma ))\setminus \{(v,v):v\in V(\sigma )\}$. Given a 2-structure $\sigma$, a s…