Article Outline
Glossary
Introduction
Some Basic Graph Theory
Random Graphs in a Nutshell
Classical Random Graphs
Random Power Law Graphs
On‐Line Random Graphs
Remarks
Bibliography
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Abbreviations
- Random graph:
-
a graph which is chosen from a certain probability distribution over the set of all graphs satisfying some given set of constraints. Statements about random graphs are thus statements about “typical” graphs for the given constraints.
- Graph diameter:
-
the maximum distance between any pair of vertices in a graph. Here the distance between two vertices is the length of any shortest path joining the vertices.
- Node degree distribution n k :
-
the number of vertices having degree k.
- Power law distribution:
-
a node degree distribution which (at least approximately) obeys \( { n_k \propto k^{-\beta} } \) with fixed positive exponent β.
- Erdős–Rényi random graph \( { {\mathcal G}(n,p) } \) :
-
a graph with n vertices, in which each possible edge between the \( { \binom n 2 } \) pairs of vertices is present with probability p. The fact that the edges are chosen independently makes it relatively easy to compute properties of \( { {\mathcal G}(n,p) } \).
- Random graph model \( { {\mathcal G}({\mathbf w}) } \) :
-
for expected degree sequence \( { \mathbf w } \):] a model which generates random graphs which, on average, will have a prescribed degree sequence \( { {\mathbf w} = (w_1, w_2, \dots, w_n) } \).
- On‐line random graph:
-
a graph which grows in size over time, according to given probabilistic rules, starting from a start graph G 0. One can make statements about these graphs in the limit of long time (and hence large vertex number n, as n approaches infinity).
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Chung, F. (2012). Random Graphs, a Whirlwind Tour of. In: Meyers, R. (eds) Computational Complexity. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-1800-9_155
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