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3. Prove that the following grammar is ambiguous by drawing two different parse trees of the same word S> asbs | as | a b

3. Prove that the following grammar is ambiguous by drawing two different parse trees of the same word S> asbs | as | a b

Database System Concepts
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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3..) Thank you in advance  for your quick response.

Subject - theory of computing.

 

Please see the attached problems

1. Describe the language, over alphabet E = {a,b}, that the following CFG generates by giving a language defining expression or an English language description. S> Xaaax | Xbbbx X> ax | bx | A 2. Find a CFG for the language of words, over alphabet E = {a,b}, that start with a, end with a and contain two b's; or start with b, end with b and contain two a's. 3. Prove that the following grammar is ambiguous by drawing two different parse trees of the same word S> asbs | as | alb
Transcribed Image Text:1. Describe the language, over alphabet E = {a,b}, that the following CFG generates by giving a language defining expression or an English language description. S> Xaaax | Xbbbx X> ax | bx | A 2. Find a CFG for the language of words, over alphabet E = {a,b}, that start with a, end with a and contain two b's; or start with b, end with b and contain two a's. 3. Prove that the following grammar is ambiguous by drawing two different parse trees of the same word S> asbs | as | alb
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