MathDB
2021 ICO Advanced P4

Source:

August 9, 2021
combinatoricsgraph theory

Problem Statement

The path number\underline{\text{path number}} of a graph is the minimum number of paths we need to partition the vertices of a graph. Given a connected graph with the independence number k>1k > 1, what is the maximum possible value for the path number in this graph? Find the answer in terms of kk.
The independence number of a graph <spanclass=latexbold>G</span><span class='latex-bold'>G</span> is the maximum possible number kk, such that there exist kk pairwise non-adjacent vertices in <spanclass=latexbold>G</span><span class='latex-bold'>G</span>.