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Expander Graph

Definition

An expander graph is a sparse graph with strong connectivity properties, meaning it remains well-connected even after removing a relatively large number of vertices or edges. In computer science and cryptography, these graphs are significant for constructing robust communication networks and efficient algorithms. They are particularly useful in distributed computing for their ability to ensure information spreads quickly and reliably across many nodes. Expander graphs possess properties valuable for building resilient decentralized systems.