Theory of Computation-UNIT 3[sem 5]

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Unit–III: Context Free Grammars (CFG) and Languages contains: Formal Definition of Context Free Grammar, Sentential form, Derivation and Derivation Tree/ Parse Tree, Context Free Language (CFL), Ambiguous Grammar, writing grammar for language, Simplification of CFG: Eliminating Є-productions, unit productions, useless production, useless symbols, and Normal Forms- Chomsky normal form, Greibach normal form, Pumping Lemma for CFG, Closure properties of CFL, Chomsky Hierarchy