Berge's Formula

Berge's Formula --- формула Бержа.

Let [math]\displaystyle{ G }[/math] be a graph and let [math]\displaystyle{ o(G) }[/math] be the number of odd components of [math]\displaystyle{ G }[/math].

Berge's Formula for estimating the deficiency of the graph:

[math]\displaystyle{ def(G) = \max_{S \subset V(G)} \{o(G \setminus S) - |S|\}. }[/math]