---
tag: W2JKBH1YF8
kind: concept
name: Expander
sources:
  - wikipedia: en:325802@r1373839425
    locator: Glossary of graph theory, section E
    note: adopted
    mention: wikipedia://en/325802#R6TW
    sections: [Summary]
inventory: [YNGH17HWHH]
---

## Summary

An expander graph is a graph whose edge expansion, vertex expansion, or spectral expansion is bounded away from zero.