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Results tagged with graph-colorings
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user 178292
Vertex colouring, Edge Colouring, List Colouring, Fractional Chromatic Number and other variants of graph colouring problems are all on topic.
6
votes
Non-definability of graph 3-colorability in first-order logic
It’s worth noting that Joel’s great answer says that $n$-colorability is not definable by a single sentence of first-order logic. However, it is definable by a first-order theory.. That is, for each …
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