Yes, the set of non-deterministic polynomial time (NP) problems is closed under the operation of union.
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Yes, the Canadian Football League (CFL) is not closed under union operation.
Having a closed under composition set in abstract algebra is significant because it means that when two elements in the set are combined using the operation defined, the result will also be an element in the set. This property is important for ensuring that the set forms a mathematical structure that follows the rules of the operation consistently.
What is a closed standards in computer network?
Yes, decidable languages are closed under concatenation.
Yes, decidable languages are closed under intersection.