Answered: Follow the following algorithm to…

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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Follow the following algorithm to transform a Regular Expression into a Finite Automaton.

Start by placing the regular expression on the edge between a start and final state:

Apply the following rules to obtain a finite automaton until all edges are labeled with either a letter or A (A-transition is the same as e-transition). (state i and state j could be the same state)

Use the above algorithm to construct an NFA for each of the following regular expressions over {a, b}.

(a + b)*
(a* + b*)*
(a*b*)*

Do the above three regular expressions describe the same language? Explain your answer.

i
i
R+S
RS
R*
J
J
J
transforms to
transforms to
transforms to
R
A
R
S
O
R
Das
A
O

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