The following questions are related to regular expression and regular language: (i) Let r,, r2, r be regular expressions. Find all the regular ones from the following expressions: a·p, r³, r* · 0, (r*)), r + r2 – r, (4) +r + 12, n+r, ÷ r,, r*), (r, r2), {rn + r2}, a+¢ (ii) Let E= {a, b}. Given regular expressions r = a*b*, r' = ba*ab* + (ab)* (ba)* and Ir" = (a* + b)b(a + b)*,- nd L(r), L(r"), and L(r"), the languages defined by r, r', r", respectively. (iii) Let E = {a, b}. Given the language L = {aam b"b, (ba)*, bb: n, m 2 0 and h 2 1}, find the regular expression r such that L(r) = L.

The following questions are related to regular expression and regular language: (i) Let r,, r2, r be regular expressions. Find all the regular ones from the following expressions: a·p, r³, r* · 0, (r)), r + r2 – r, (4) +r + 12, n+r, ÷ r,, r), (r, r2), {rn + r2}, a+¢ (ii) Let E= {a, b}. Given regular expressions r = ab, r' = baab + (ab)* (ba)* and Ir" = (a* + b)b(a + b),- nd L(r), L(r"), and L(r"), the languages defined by r, r', r", respectively. (iii) Let E = {a, b}. Given the language L = {aam b"b, (ba), bb: n, m 2 0 and h 2 1}, find the regular expression r such that L(r) = L.

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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