Cores, shell indices and the degeneracy of a graph limit
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Submission date: 16. May. 2018
Keywords and phrases: graph limit, shell index, graph core, graph degeneracy
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The k-core of a graph is the maximal subgraph in which every node has degree at least k, the shell index of a node is the largest k such that the k-core contains the node, and the degeneracy of a graph is the largest shell index of any node. After a suitable normalization, these three concepts generalize to limits of dense graphs (also called graphons). In particular, the degeneracy is continuous with respect to the cut metric.