Computer Science · Theory of Computation
Which of the following statements is NOT true in formal language theory?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1If a language is recursively enumerable, its complement is always recursively enumerable.✓
- 2If a language and its complement are both recursively enumerable, then it is recursive.
- 3If a language is recursive, its complement is recursively enumerable.
- 4If a language is recursive, its complement is recursive.
Correct answer
If a language is recursively enumerable, its complement is always recursively enumerable.
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