Editing Graph theory
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* An '''independent set''' is a subset of a graph's vertices such that no two vertices in the subset are adjacent. The '''maximum independent subset problem''' is that of finding an independent subset of maximum size. This problem is NP-hard. | * An '''independent set''' is a subset of a graph's vertices such that no two vertices in the subset are adjacent. The '''maximum independent subset problem''' is that of finding an independent subset of maximum size. This problem is NP-hard. | ||
* It is possible to determine whether a graph is planar in linear time using an algorithm due to Tarjan, but this is extremely complex. | * It is possible to determine whether a graph is planar in linear time using an algorithm due to Tarjan, but this is extremely complex. | ||
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