NTA-NET (UGC-NET) Computer Science & Applications (87) Theory of Computation-Computability Study Material (Page 13 of 24)

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Context Free Language

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Context Free Language

  • In this section, we are only concerned about the introduction of the Context free languages. Only some basic aspects will be covered for taking rest of the topics forward.
  • Context-free languages (CFLs) are generated by context-free grammars. The set of all context-free languages is identical to t…

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Pushdown Automaton

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Pushdown Automaton

  • Pushdown automata (PDAs) can be thought of as combining an NFA “control-unit” with a “memory” in the form of an infinite stack. PDAs are more powerful than FAs, being able to recognize languages that FAs cannot. In fact, the set of languages that can be recognized by PDAs are the context-free languages.
  • Pushdown …

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