Regular graphs | Individual graphs

Tietze's graph

In the mathematical field of graph theory, Tietze's graph is an undirected cubic graph with 12 vertices and 18 edges.It is named after Heinrich Franz Friedrich Tietze, who showed in 1910 that the Möbius strip can be subdivided into six regions that all touch each other – three along the boundary of the strip and three along its center line – and therefore that graphs that are embedded onto the Möbius strip may require six colors. The boundary segments of the regions of Tietze's subdivision (including the segments along the boundary of the Möbius strip itself) form an embedding of Tietze's graph. (Wikipedia).

Tietze's graph
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