[HTML][HTML] Minimal obstructions to 2-polar cographs

P Hell, C Hernández-Cruz, CL Sales - Discrete Applied Mathematics, 2019 - Elsevier
A graph is a cograph if it is P 4-free. A k-polar partition of a graph G is a partition of the set of
vertices of H into parts A and B such that the subgraph induced by A is a complete …

[HTML][HTML] Minimal obstructions to (s, 1)-polarity in cographs

FE Contreras-Mendoza, C Hernández-Cruz - Discrete Applied Mathematics, 2020 - Elsevier
Let s, k be non negative integers. A graph G is (s, k)-polar if its vertex set admits a partition
(A, B) such that A induces a complete multipartite graph with at most s parts, and B induces a …

Minimal Obstructions for Polarity, Monopolarity, Unipolarity and (s, 1)-Polarity in Generalizations of Cographs

FE Contreras-Mendoza, C Hernández-Cruz - Graphs and Combinatorics, 2024 - Springer
It is known that every hereditary property can be characterized by finitely many minimal
obstructions when restricted to either the class of cographs or the class of P 4-reducible …

Minimal obstructions to (∞, k)-polarity in cographs

FE Contreras-Mendoza, C Hernández-Cruz - Discrete Mathematics, 2021 - Elsevier
A graph is a cograph if it does not contain a 4-vertex path as an induced subgraph. An (s, k)-
polar partition of a graph G is a partition (A, B) of its vertex set such that A induces a …