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[Specifically in this example]enter image description here]1

victor
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user3047661
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    I'm voting to close this question as off-topic because it is about mathematics rather than programming. – John Coleman Jul 07 '17 at 17:57
  • ok sorry :(((((( – user3047661 Jul 07 '17 at 20:10
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    It isn't a big deal. As a rule of thumb, if your question can be answered without any code or at least discussion of an algorithm then it probably belongs on [mathematics.se]. The border between the two sites can be fuzzy at times, especially since so many tags are the same (e.g. `graph-theory`). – John Coleman Jul 07 '17 at 20:15

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Not sure if this is the correct forum to post this, but an overline on a graph means the complement of the graph.

https://en.wikipedia.org/wiki/Complement_graph

victor
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