The Kneser graphs are a class of graph introduced by Lovász to prove Kneser's conjecture. Given two positive integers n and k, the Kneser graph K(n, k), often denoted K_(n:k) (Godsil and Royle 2001, pp. 31-32), is the graph whose vertices represent the k-subsets of {1, ..., n}, and where two vertices are connected if and only if they correspond to disjoint subsets. K(n, k) therefore has (n k) vertices and is regular of degree (n - k k).
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