On the k-independence number of graphs
2019
Abstract This paper generalizes and unifies the existing spectral bounds on the k -independence number of a graph, which is the maximum size of a set of vertices at pairwise distance greater than k . The previous bounds known in the literature follow as a corollary of the main results in this work. We show that for most cases our bounds outperform the previous known bounds. Some infinite families of graphs where the bounds are tight are also presented. Finally, as a byproduct, we derive some spectral lower bounds for the diameter of a graph.
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