Let Σ={0,1,a}. The language L that we are interested in is all and only the strings that do NOT contain the substring 01. We can write a context-free grammar (CFG) for it: S → 0A | 1S | aS | ε A → 0A | aS | ε Informally explain the two parts of the expression “all and only the strings.” How do we know that we get all the strings of L by this grammar? And, how do we know that we get only the strings of L by this grammar?
Let Σ={0,1,a}. The language L that we are interested in is all and only the strings that do NOT contain the substring 01. We can write a context-free grammar (CFG) for it: S → 0A | 1S | aS | ε A → 0A | aS | ε Informally explain the two parts of the expression “all and only the strings.” How do we know that we get all the strings of L by this grammar? And, how do we know that we get only the strings of L by this grammar?
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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Let Σ={0,1,a}. The language L that we are interested in is all and only the strings
that do NOT contain the substring 01.
We can write a context-free grammar (CFG) for it:
S → 0A | 1S | aS | ε
A → 0A | aS | ε
Informally explain the two parts of the expression “all and only the strings.” How do we know
that we get all the strings of L by this grammar? And, how do we know that we get only the strings of
L by this grammar?
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