Regular expressions are built recursively out of smaller regular expressions, using some rules described below. Each regular expression ? denotes a language ?(?), which is also defined recursively from the languages denoted by ?′? subexpressions. Given an alphabet ∑ = {0, 1}, write the language denoted by the following regular expressions: (i) 1 (ii) 0 | 1 (iii) (0 | 1) (iv) (0 | 1)∗ (v) 1(0 | 1)∗ (vi) 0 |1 (0| 1)
Regular expressions are built recursively out of smaller regular expressions, using some rules described below. Each regular expression ? denotes a language ?(?), which is also defined recursively from the languages denoted by ?′? subexpressions. Given an alphabet ∑ = {0, 1}, write the language denoted by the following regular expressions: (i) 1 (ii) 0 | 1 (iii) (0 | 1) (iv) (0 | 1)∗ (v) 1(0 | 1)∗ (vi) 0 |1 (0| 1)
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Regular expressions are built recursively out of smaller regular
expressions, using some rules described below. Each regular expression ?
denotes a language ?(?), which is also defined recursively from the
languages denoted by ?′? subexpressions.
Given an alphabet ∑ = {0, 1}, write the language denoted by the following
regular expressions:
(i) 1
(ii) 0 | 1
(iii) (0 | 1)
(iv) (0 | 1)∗
(v) 1(0 | 1)∗
(vi) 0 |1 (0| 1)
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