A **constraint graph** is a graphical representation of a set of variables and the constraints that exist between them. It is particularly useful in fields like artificial intelligence, operations research, and computer science, especially for problems involving constraint satisfaction. ### Components of a Constraint Graph: 1. **Nodes (Vertices)**: Each node represents a variable in the problem. For example, if you are solving a scheduling problem, each variable could represent a specific task that needs to be scheduled.
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