Which is the only true statement among the following?There are some context-free languages that contain no infinite regular subsets.A regular language cannot contain a subset that is context free.O A context-free language cannot contain a subset that is regular.A context-free language must contain an infinite regular subset.A context-free language cannot contain a finite subset.

CFG is a conventional punctuation which is utilized to produce all potential examples of strings in…

Answered: There are some context-free languages…

There are some context-free languages that contain no infinite regular subsets A regular language cannot contain a subset that is context free.

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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> Let L = {a"b":n>0} a. Show that L² is a context-free language. b. Show that L' is a context-free language.
Complete the following context free grammar for the following language. Please ASAP
1.F 1. Prove that the following language L is not contextfree: L = { a'b'a| j>i>1 }.
Suppose that L is a context-free language and that R is a regular language. Is L - R necessarily context-free, where L - R means set difference? Is R - L necessarily context-free? Justify your answers. Hint: You may use that fact the intersection of a context-free language and a regular language is context-free
I need help creating a context free grammar that can develop multiple sentences it must be done in Java with the following 1. Identifying the syntax and grammar rules of American English: This involves analyzing the grammatical structure of sentences in American English and identifying the different parts of speech and how they are used in sentences. 2. Developing a set of context-free grammar rules: Based on the analysis of American English syntax and grammar, develop a set of context-free grammar rules that can be used to generate valid sentences in American English. a. Defining a set of nonterminal symbols that represent parts of speech, such as nouns, verbs, adjectives, adverbs, and prepositions. b. Defining a set of terminal symbols that represent words in the English language. c. Defining production rules that describe how nonterminal symbols can be expanded into other nonterminal symbols and terminal symbols. 3. Implementing a parser for the context-free grammar using…
2) Give examples of each of the following: a) A language that is not context free. b) A language that is context free but not deterministic context free. c) A language that is accepted by a deterministic pushdown automaton but is not regular.
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I need help with my context free language. It needs to do the following 1. Developing a language model based on the context-free grammar: Use the context-free grammar to develop a language model that can be used to generate coherent and grammatically correct sentences in American English.2. Incorporating semantic information into the context-free grammar: Expand the context- free grammar to incorporate semantic information, such as word meaning and context, to generate more meaningful sentences in American English. Please edit the program to where it does what I asked for. I need an original answer that edits my code to do the following of what I asked for above here is my Java code import java.util.*;import java.util.stream.Collectors; public class CFG { private static Map<String, List<String>> rules;     public static void main(String[] args) { rules = new HashMap<>(); initializeGrammarRules();         String sentence = generateSentence("S");…
I need help with my context free language. It needs to do the following 1. Developing a language model based on the context-free grammar: Use the context-free grammar to develop a language model that can be used to generate coherent and grammatically correct sentences in American English.2. Incorporating semantic information into the context-free grammar: Expand the context- free grammar to incorporate semantic information, such as word meaning and context, to generate more meaningful sentences in American English. Please edit the program to where it does what I asked for. I need an original answer that edits my code to do the following of what I asked for above here is my Java code import java.util.*;import java.util.stream.Collectors; public class CFG { private static Map<String, List<String>> rules;     public static void main(String[] args) { rules = new HashMap<>(); initializeGrammarRules();         String sentence = generateSentence("S");…
Q5 of 6 Pumping Lemma for Context-Free languages Show that the following languages are not context-free: (Choose two of the following (You should only solve two of the following questions)) (5-a) L= {a"b'a"b' |n>0, j>0}. (5-b) L= {a"´ b" |n20}.
Suppose that L is a context-free language and that R is a regular language. Is L - R necessarily context-free, where L - R means set difference? Is R - L necessarily context-free? Justify your answers.
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