Find regular expressions for the languages accepted by the following automata. (a) a b a a a
Find regular expressions for the languages accepted by the following automata. (a) a b a a a
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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Step 1
Definition:
Regular Expression:
- It is a particular order of the characters which is used for defining the search pattern.
- Normally they are been used by the patterns which are used by the string searching patterns that is for the find or replace operations that are on the string or for a particular input validation.
- This technique is been developed by using the theoretical computer science and also the formal language theory.
- Regular expression can have dashes which is used for matching the range of the characters as all the lower case letters as well.
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