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Regular patterns, regular languages and context-free languages

✍ Scribed by Sanjay Jain; Yuh Shin Ong; Frank Stephan


Book ID
108154722
Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
164 KB
Volume
110
Category
Article
ISSN
0020-0190

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A language is regular if it can be recognized by a ΓΏnite automaton. According to the pumping lemma, every inΓΏnite regular language contains a regular subset of the form uv + w, where u; v; w are words and v is not empty. It is known that every regular language can be expressed as ( i∈I uiv + i wi) βˆͺ