Paul Seymour, The Erdős-Hajnal conjecture is true for excluding a five-cycle
Zoom ID: 869 4632 6610 (ibsdimag)In an n-vertex graph, there must be a clique or stable set of size at least
In an n-vertex graph, there must be a clique or stable set of size at least
The Gyárfás-Sumner conjecture says that for every forest
In 1977, Erdős and Hajnal made the conjecture that, for every graph