Math 2.0

Combinatorics Graph theory: basic notions Concept

Girth

Summary

The girth of a graph is the length of its shortest cycle, and it is infinite for a graph without cycles. Large girth means that the graph looks like a tree near each vertex. Graphs with both large girth and large chromatic number exist, a classical result of the probabilistic method. The node girth gives the precise definition.

Further reading

  1. Web https://en.wikipedia.org/wiki/Girth_(graph_theory)
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Changed2 November 2026

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