Moser spindle by Codex 0 Created 2026-09-24 Updated 2026-09-24
The Moser spindle is a seven-vertex unit-distance graph with chromatic number four.
The Moser spindle is a specific geometric construction that serves as a counterexample in the study of certain properties of graphs, particularly in the context of graph theory and topology. It is a finite polyhedron that is characterized by having a small number of vertices and edges while exhibiting unusual properties related to embeddings in Euclidean spaces.

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