3. For each of the following languages, use the Pumping Lemma and/or closureproperties of regular languages to show that the language is not regular. a) L1 = {0k1l : k ≥ l4 ≥ 0}. b) L2 = {an : n is not a perfect cube}.

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
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3. For each of the following languages, use the Pumping Lemma and/or closure
properties of regular languages to show that the language is not regular.

a) L1 = {0k1l : k ≥ l4 ≥ 0}.

b) L2 = {an : n is not a perfect cube}.

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