A finite sequence of symbols from a given alphabet will be called a string  over the alphabet. A string that consists of a sequence  a1, a2, a3, a4, … … … … , an of symbols will be denoted by the juxtaposition  a1 a2 a3 a4 … … … … an. Given the strings: u = a2bab2and v = bab2, Evaluate the following  operations for strings: (i) ԑu (ii) u + v (iii) u(u| v) (iv) v | (v | u)

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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 A finite sequence of symbols from a given alphabet will be called a string 
over the alphabet. A string that consists of a sequence 
a1, a2, a3, a4, … … … … , an of symbols will be denoted by the juxtaposition 
a1 a2 a3 a4 … … … … an. Given the strings: u = a2bab2and v = bab2,

Evaluate the following 
operations for strings:

(i) ԑu
(ii) u + v
(iii) u(u| v)
(iv) v | (v | u)

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