Lecture 36:Design of Context-free Grammar

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Design of Context-free Grammar in a simplified form for the languages:
1. a^nb^mc^n
2. a^b^jc^k | j=i+k
3. a^b^jc^k | k=i+j
4. a^b^jc^k | i is not equal to j+k
5. (ab*a+bc)*(bc)*
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Sir can you please explain difference between L1UL2 and L1.L2? When haven't we used L1.L2 in question having inequality like i!=j+k?

harma
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sir , at 13:10 can we write A->aWaA ?

garushigarushi