Question: Possible Maple Bug (GraphTheory Package)

Hi, I'm on Maple 2020 on Mac, and running this:

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In fact, that isn't the Chromatic number of that graph. Is not possible to color that graph with 2 colors becuase C7 (Cycle with 7 vertex) is a subgraph which is imposible to color with 2 colors. Am I doing something wrong? Can you replicate this? Is this a bug or is me?



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