Consider the two regular expressions, L1 = = a* + b* and L2 = ab* + ba* + b*a + (a*b)* a) Find a string corresponding to L, but not L2. b) Find a string corresponding to L2 but not L1 c) Find a string in {a, b}* corresponding to

Consider the two regular expressions, L1 = = a* + b* and L2 = ab* + ba* + ba + (ab)* a) Find a string corresponding to L, but not L2. b) Find a string corresponding to L2 but not L1 c) Find a string in {a, b}* corresponding 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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Question

Consider the two regular expressions,
L1
= a* + b* and L2
= ab* + ba* + b*a + (a*b)*
a) Find a string corresponding to L, but not L2.
b) Find a string corresponding to L2 but not L1
c) Find a string in {a,b}* corresponding to
neither L1 nor L2.

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