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Regular Expressions Three - Automata and Complexity Theory - Lecture Slides

Slides, Automata

Post: April 29th, 2013
Description
Some concept of Automata and Complexity Theory are Administrivia, Closure Properties, Context-Free Grammars, Decision Properties, Deterministic Finite Automata, Intractable Problems, More Undecidable Problems. Main points of this lecture are: Regular Expressions Three, Practical Applications, Mathematics, Phenomenon Discovered, Definitional Power, Regular Languages, Formally Defined, Language, Induction, Regular Language
Some concept of Automata and Complexity Theory are Administrivia, Closure Properties, Context-Free Grammars, Decision Properties, Deterministic Finite Automata, Intractable Problems, More Undecidable Problems. Main points of this lecture are: Regular Expressions Three, Practical Applications, Mathematics, Phenomenon Discovered, Definitional Power, Regular Languages, Formally Defined, Language, Induction, Regular Language
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Contents
Chapter Seven: Regular Expressions Docsity.com The first time a young student sees the mathematical constant , it looks like just one more school artifact: one more arbitrary symbol whose definition to memorize for the next test. Later, if he or she persists, this perception changes. In many branches of mathematics and with many practical applications, keeps on turning up. "There it is again!" says the student, thus joining the ranks of mathematicians for whom mathematics seems less like an artifact invented and more like a natural phenomenon discovered. So it is with regular languages. We have seen that DFAs and NFAs have equal definitional power. It turns out that regular expressions also have exactly that same definitional power: they can be used to define all the regular languages, and only the regular languages. There it is again! Docsity.com Outline • 7.1 Regular Expressions, Formally Defined • 7.2 Regular Expression Examples • 7.3 For Every Regular Expression, a Regul..

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