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In each case, you should provide two strings in L and two strings not in L in the spaces provided.  (All of the strings must be in Σ∗) :

In each case, you should provide two strings in L and two strings not in L in the spaces provided.  (All of the strings must be in Σ∗) :

Database System Concepts
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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In each case, you should provide two strings in L and two strings not in L in the spaces provided.  (All of the strings must be in Σ∗) :

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Basis: abb e L. Recursive step: If u e L, and u ends in abk then uak+1 e L. If u € L, a in bak then ubk+1 € L. Closure: Every string in L can be derived by applying the recursive ste finite number of times. w e L: w E L: w ¢ L: w ¢ L:
Transcribed Image Text:Basis: abb e L. Recursive step: If u e L, and u ends in abk then uak+1 e L. If u € L, a in bak then ubk+1 € L. Closure: Every string in L can be derived by applying the recursive ste finite number of times. w e L: w E L: w ¢ L: w ¢ L:
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