If L1 is regular L2 is unknown but L1-L2 is regular ,then L2 must be ans.RegularCFGEmpty setDecidableThis Question Is Marked For Review Previous Remove From Review Next
Question
If L1 is regular L2 is unknown but L1-L2 is regular ,then L2 must be ans.RegularCFGEmpty setDecidableThis Question Is Marked For Review Previous Remove From Review Next
Solution
The statement is not necessarily true. The language L2 could be any language, regular or not. The operation L1 - L2 results in a language that consists of all the strings that are in L1 but not in L2. This operation does not provide any information about the regularity of L2. Therefore, we cannot conclude that L2 must be regular, context-free grammar (CFG), an empty set, or decidable.
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