'Infinite language' presentation slideshows

Languages

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Applications of Regular Closure

Applications of Regular Closure. The intersection of a context-free language and a regular language is a context-free language. Regular Closure. context free. regular. context-free. An Application of Regular Closure. Prove that:. is context-free.

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???? LANGUAGE

1. ???? LANGUAGE. LANGUAGE. ??????????. ???????????? ?????? letters ?? words ?????? sentences ??????? paragraphs ????????? coherent stories. COLLECTION & SEQUENTIAL. How do they do that ?. LANGUAGE. ???????????????. ??????????????????????? ?????? letters ??????? key words

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Closure Properties of Context-Free languages

Closure Properties of Context-Free languages. Union. Context-free languages are closed under:. Union. is context free. is context free. is context-free. Example. Language. Grammar. Union. In general:. For context-free languages with context-free grammars and start variables .

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Chapter 1 Automata: the Methods & the Madness

Chapter 1 Automata: the Methods & the Madness. Angkor Wat, Cambodia. Outline. 1.1 Why Study Automata Theory? 1.2 Introduction to Formal Proof 1.3 Additional Forms of Proof 1.4 Inductive Proofs 1.5 Central Concepts of Automata Theory. 1.1 Why Study Automata Theory?.

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FST Morphology

FST Morphology. Miriam Butt October 2003. Based on Beesley and Karttunen 2003. Recap. Last Time: Finite State Automata can model most anything that involes a finite amount of states. We modeled a Coke Machine and saw that it could also be thought of as defining a language.

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Recap lecture 25

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Pumping Lemma

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Kleene Star Closure

Kleene Star Closure. Given ?, then the Kleene Star Closure of the alphabet ? , denoted by ? * , is the collection of all strings defined over ? , including ? . It is to be noted that Kleene Star Closure can be defined over any set of strings. Examples. If ? = {x}

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Decidable Problems of Regular Languages

Decidable Problems of Regular Languages. Answer:. Take the DFA that accepts and check if is accepted. Membership Question. Question:. Given regular language and string how can we check if ?. DFA. DFA. Question:. Given regular language how can we check

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Decidable Problems of Regular Languages

Decidable Problems of Regular Languages. Answer:. Take the DFA that accepts and check if is accepted. Membership Question. Question:. Given regular language and string how can we check if ?. DFA. DFA. Question:. Given regular language how can we check

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Recap lecture 26

Recap lecture 26. Example of nonregular language, pumping lemma version I, proof, examples,. Pumping Lemma version II.

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Lecture 3 Regular Epressions Pumping Lemma

Lecture 3 Regular Epressions Pumping Lemma. Jan Maluszynski , IDA, 200 7 http://www.ida.liu.se/~janma janma @ ida.liu.se. Outline. Motivating example RE Definition Equivalence with FA Pumping Lemma for RE. Motivating example. A language L over {a,b}: a string x is in L iff

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Lecture # 3

Lecture # 3. An Important language. PALINDROME The language consisting of ? and the strings s defined over ? such that Rev(s)=s. It is to be denoted that the words of PALINDROME are called palindromes. Example : For ? ={a,b}, PALINDROME={ ? , a, b, aa, bb, aaa, aba, bab, bbb, ...}.

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