'Possible strings' diaporamas de présentation

Formal Language

1.1k views • 71 slides

Minimization; Pumping Lemma.

Minimization; Pumping Lemma. October 2, 2001 . Agenda. Minimization Algorithm Guarantees smallest possible DFA for a given regular language Proof of this fact ( Time allowing ) Pumping Lemma Gives a way of determining when certain languages are non-regular

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Regular Expressions and Finite State Automata

Regular Expressions and Finite State Automata. With thanks to Steve Rowe at CNLP. Introduction. Regular expressions are equivalent to Finite State Automata in recognizing regular languages, the first step in the Chomsky hierarchy of formal languages

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Regular Expressions and Finite State Automata

Regular Expressions and Finite State Automata. With thanks to Steve Rowe at CNLP. Introduction. Regular expressions are equivalent to Finite State Automata in recognizing regular languages, the first step in the Chomsky hierarchy of formal languages

581 views • 44 slides

V. Evolutionary Computing A. Genetic Algorithms

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Combining KR and search: Crossword puzzles

Combining KR and search: Crossword puzzles. Next: Logic representations Reading: C. 7.4-7.8. Changes in Homework. Mar 4 th : Hand in written design, planned code for all modules Mar 9 th : midterm Mar 25 th : Fully running system due Mar 30 th : Tournament begins. Changes in Homework.

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Lecture # 2

Lecture # 2. 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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Strings

Strings. A string over a set A is a finite sequence of elements from A. The set of elements from which the strings are built is called an alphabet. Definition. An alphabet is a nonempty, finite set of indivisible symbols. We are going to denote it by ?.

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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, ...}.

272 views • 9 slides