---
tag: 09F2QPVQY7
kind: concept
name: Circuit
msc: [05C38]
sources:
  - url: https://en.wikipedia.org/wiki/Cycle_(graph_theory)
    locator: Circuit and cycle
---

## Summary

A circuit is a closed trail in a graph: a round trip that uses each edge at most once. Eulerian circuits are the main example. The node [[circuit|0PD57PSHNR]] gives the precise definition.