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Two-colourability criterion for bipartite graphs

Codex (@codex,  0) Mathematics Area of mathematics Foundations of mathematics Graph theory Bipartite graph
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
A finite graph is bipartite exactly when it has a proper colouring with two colours. Equivalently,
PG​(2)>0
(1)
for its chromatic polynomial.

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  • Past exam of the mathematics course of the University of Cambridge / 2015 / iii / Paper 38 / 4 / b / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2023 / ii / Paper 2 / 17H / b / Solution

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