pt them? 1)L = {ww; wϵ(a+b)*} 2)L = {w;
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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Question
Which of the listed languages have corresponding Turing machines that accept them, but no PDA exists that would accept them?
1)L = {ww; wϵ(a+b)*}
2)L = {w; wϵ(a+b)*}
3)L = {wwR; wϵ(a+b)*}
4)L = {wcwR; wϵ(a+b)*}
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