Recursively enumerable languages are not closed under ______________(a) Union(b) Intersection(c) Complementation(d) Concatenation

Recursively enumerable languages are not closed under ______________(a

1.	Recursively enumerable languages are not closed under ______________(a) Union(b) Intersection(c) Complementation(d) Concatenation
Answer» Right choice is (c) Complementation To explain: Recursive languages are closed under the following operations. The Kleene star L * of L the concatenation L * o P of L and P the union L U P the intersection L ∩ P.

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Recursively enumerable languages are not closed under ______________(a) Union(b) Intersection(c) Complementation(d) Concatenation

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