Cactus

Cactus — кактус, дерево Хусими.

A graph [math]\displaystyle{ \,G }[/math] is a сactus if every its edge is a part of at most one cycle in [math]\displaystyle{ \,G }[/math]. Cactus graphs are outerplanar since they cannot contain [math]\displaystyle{ \,K_{4} }[/math] or [math]\displaystyle{ \,K_{2,3} }[/math] as a minor. Cactus graphs have treewidth [math]\displaystyle{ \leq 2 }[/math].

Литература

• Евстигнеев В.А., Касьянов В.Н. Словарь по графам в информатике. — Новосибирск: Сибирское Научное Издательство, 2009.