Theorems · Theorem · combinatorics
SimpleGraph.IsAcyclic.chromaticNumber_le_two
∀ {V : Type u_1} {G : SimpleGraph V}, G.IsAcyclic → G.chromaticNumber ≤ 2The chromatic number of an acyclic graph (forest) is at most 2.
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- Foundations
- Depth 96 from the axioms · uses propext, Classical.choice, Quot.sound
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- ENatstatement · cited by 4,985
- SimpleGraphstatement and proof · cited by 3,072
- SimpleGraph.IsAcyclicstatement and proof · cited by 67
- SimpleGraph.chromaticNumberstatement · cited by 54
- SimpleGraph.Colorable.chromaticNumber_leproof · cited by 11
- SimpleGraph.IsAcyclic.colorable_twoproof · cited by 2
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