Indecomposable tournaments and their indecomposable subtournaments on 5 and 7 vertices

Houmem BELKHECHINE, Imed BOUDABBOUS

Given a tournament T=(V,A), a subset X of $V$ is an interval of T provided that for every a, b in X and x\in V-X, (a,x) in A if and only if (b,x) in A. For example, $\varnothing$, {x…