3rd Unit Notes Pdf Flat

as per syllabus:

UNIT - III Context-Free Grammars: Definition of Context-Free Grammars, Derivations Using a Grammar, Leftmost and Rightmost Derivations, the Language of a Grammar, Sentential Forms, Parse Tress, Applications of Context-Free Grammars, Ambiguity in Grammars and Languages. Push Down Automata,: Definition of the Pushdown Automaton, the Languages of a PDA, All JNTU World Equivalence of PDA's and CFG's, Deterministic Pushdown Automata. 

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