an informal description of a PDA, or a regular

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question
Classify each of the following languages as being
• regular
• context-free but not regular
• not context-free
Justify your choice in each case (say, by using a
pumping lemma, or by presenting a finite automaton
or an informal description of a PDA, or a regular
expression or grammar, et cetera).
D = {a^i b^j c^k:i> 2j > 3k}
E = {a, b, c}* –D
||
Transcribed Image Text:Classify each of the following languages as being • regular • context-free but not regular • not context-free Justify your choice in each case (say, by using a pumping lemma, or by presenting a finite automaton or an informal description of a PDA, or a regular expression or grammar, et cetera). D = {a^i b^j c^k:i> 2j > 3k} E = {a, b, c}* –D ||
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