'Language accepted' diaporamas de présentation

Standard Representations of Regular Languages

Standard Representations of Regular Languages. Regular Languages. DFAs. Regular Grammars. NFAs. Regular Expressions. When we say:. We are given a Regular Language. We mean:. Language is in a standard representation. Elementary Questions about Regular Languages. Answer:.

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Non Deterministic Automata

Non Deterministic Automata. Nondeterministic Finite Accepter (NFA). Alphabet =. Nondeterministic Finite Accepter (NFA). Alphabet =. Two choices. Nondeterministic Finite Accepter (NFA). Alphabet =. Two choices. No transition. No transition. First Choice. First Choice. First Choice.

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Deterministic Finite Automaton (DFA)

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Non-regular languages

Non-regular languages. Non-regular languages. Regular languages. Prove that there is no DFA that accepts. How can we prove that a language is not regular?. Problem: this is not easy to prove. Solution: the Pumping Lemma !!!. The Pigeonhole Principle. pigeonholes. pigeonholes.

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Formal Languages Non-Regular Languages

Formal Languages Non-Regular Languages. Non-regular languages. Regular languages. Prove that there is no DFA that accepts. How can we prove that a language is not regular?. Problem: this is not easy to prove. Solution: the Pumping Lemma !!!. The Pigeonhole Principle. pigeons.

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Computability and Complexity

Computability and Complexity. Turing Machine. 3-1. Computability and Complexity Andrei Bulatov. Computability and Complexity. 3-2. What is a computation?. Alan Turing considered this question in 1936 He argued that any computation can be done using the following steps:.

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Computability and Complexity

Computability and Complexity. Turing Machine. 3-1. Computability and Complexity Andrei Bulatov. Computability and Complexity. 3-2. What is a computation?. Alan Turing considered this question in 1936 He argued that any computation can be done using the following steps:.

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Closure properties for regular languages

Closure properties for regular languages. If L and M are Regular, so are:. Closure under intersection. Decision Problems for Regular Languages. From epsilon NFA to DFA. How can we decide whether the language accepted by a DFA is finite or infinite?. emptyness. Equivalence and minimization.

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Non-deterministic FSA

Non-deterministic FSA. Regular Languages . A Language is called Regular iff there is a DFA acceptor that defines it. There exists some DFA M such that L = L(M). NFA. Two non-deterministic elements: Lambda transitions 2 outarcs with same symbol

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