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Network science

The study of complex networks — systems of interconnected nodes (vertices) and their relationships (edges). Network science provides mathematical frameworks and empirical methods to understand the structure, dynamics, and function of diverse real-world systems including social networks, the Internet, biological networks, and information flow systems.

Key concepts

Network structure — Degree distributions, clustering coefficients, path lengths, and correlations between nodes. Many real-world networks exhibit non-random properties such as power-law degree distributions (scale-free networks) and high clustering despite short average path lengths (small-world effect).

Network models — Mathematical models that reproduce observed properties of real networks, including random graphs, small-world networks (Watts-Strogatz), scale-free networks with preferential attachment, and exponential random graphs.

Processes on networks — Dynamics of systems evolving on network structures, including epidemic spreading, information cascades, synchronization, optimization, and phase transitions driven by network topology.

Key papers