Connected graph with 2016 vertices
Source: Turkey JBMO TST 2016 P8
May 22, 2016
combinatoricsgraph theory
Problem Statement
Let be a simple connected graph with vertices and edges. We want to choose a set of vertices where there is no edge between them and delete all these chosen vertices (we delete both the vertices and all edges of these vertices) such that the remaining graph becomes unconnected. If we can do this task no matter how these edges are arranged (by making the graph connected), find the maximal value of .