Prove that the following languages are not regular: (b) L = {anblak : k ≠ n + l}. (c) L = {anblak : n = l or l ≠ k}. (d) L = {anbl : n ≥ l}. (e) L = {w : na (w) ≠ = nb (w)}. (f) L = {ww : w ∈ {a, b}∗}.
Prove that the following languages are not regular: (b) L = {anblak : k ≠ n + l}. (c) L = {anblak : n = l or l ≠ k}. (d) L = {anbl : n ≥ l}. (e) L = {w : na (w) ≠ = nb (w)}. (f) L = {ww : w ∈ {a, b}∗}.
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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Prove that the following languages are not regular:
(b) L = {anblak : k ≠ n + l}.
(c) L = {anblak : n = l or l ≠ k}.
(d) L = {anbl : n ≥ l}.
(e) L = {w : na (w) ≠ = nb (w)}.
(f) L = {ww : w ∈ {a, b}∗}.
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