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Theory of Computation 7. Write down the Chomsky Normal Form for the context-free language de- fined...
In each of the following, find a Chomsky Normal Form (CNF) grammar equivalent to the given context-free grammar (CFG). 1. SaA Sab A+ ab | BA ASD BaS b 2. SAIC A → AaB AaC | B | a B Bb Cb (→ cclc 3. S → SabA; AAA bc | Bc; B → Aab | BS a
2. To find a Chomsky normal form for the following grammar (10 points) STR T - aTbab R RIA first note that we don't need to add a new production S' Sto the grammar because s does not appear on the right hand side of any productions in the grammar. Next, since we have a A-production in the grammar R - A, so we use the technique in question #6 to remove the production. Afterward the grammar becomes SLT TR...
1)Convert the following context free grammar to Chomsky Normal Form S → a X | Yb X → S | λ Y → b Y | λ 2)Some languages distinguish between uppercase and lowercase in identifiers. What are the pros and cons of this design decision? 3)Use the pumping lemma to prove that the following languages are not regular. (The alphabet is Σ = {a, b}.) a) L = {an b1 ak: k >= n+ l} b) L = {ww:...
Theory of Computation - Push Down Automata (PDA) and Context Free Grammars (CFG) Problem 1. From a language description to a PDA Show state diagrams of PDAs for the following languages: a. The set of strings over the alphabet fa, b) with twice as many a's as b's. Hint: in class, we showed a PDA when the number of as is the same as the number of bs, based on the idea of a counter. + Can we use a...