Describe the following regular expressions: 1) a (a+b)*abba 2) (0+1)* 1 (0+1)* 11 (0+1)* Prove the following language is not regular: L = anbncm , where n>=1, m<=7

Describe the following regular expressions: 1) a (a+b)abba 2) (0+1) 1 (0+1)* 11 (0+1)* Prove the following language is not regular: L = anbncm , where n>=1, m<=7

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

See similar textbooks

Related questions

Q: No A B C 4. Consider the following PDAs. Match them with the suitable definition of the languages…

A: According to the information given:- we have to fill the matched PDA between language to grammar.

Q: Construct an NPDA on 2= {a,b,c}_for each of the following languages: a) L = {a"bm|0 < m s } L =…

A: Answer

Q: Formalize the following sentence in english: Vx3y. (xy = 1)

A: Given Sentence, ∀x∃y.(xy=1) As ∀ is Universal Quantifier which is used for all, every, each,…

Q: 4. Prove the following two languages are context-free: (1) {a*b°c*d° | n2 0}

A: As per our guidelines we are supposed to answer only one question. Kindly repost other question as a…

Q: Give regular expressions for the following languages. (a) L1 = {anbm, n ≥ 3, m ≤ 4} (b) L2 = {anbm :…

A: Answer:Regular expression:a. L = {an bm, n >=3, m <= 4}

Q: 1. Design Push down automata for the following language L over 3D{0,1} Try to take a lot of space…

A: 1) Alphabet Σ = {0,1}(i) language L = {0n 1m | n, m ≥ 1 and m > = n + 2}L = {0111, 001111,…

Q: Consider the following two statements: S1: { 0^2n|n>=1 } is a regular language S2: { 0^ m 0^ n…

A: HI THEREI AM ADDING ANSWER BELOWPLEASE GO THROUGH ITTHANK YOU

Q: Q.No.2. Construct FSA for a language having words which contain even number of a’s & b’s and starts…

A: Here the FSA starts with aa and ends with bb and have even numbers of a's and b's.

Q: Construct regular expressions over Σ = {0,1} representing the following languages: All strings with…

A: Lets construct the regular expression that contains all the strings with 010 as a substring over Σ =…

Q: Please draw a finite automata of the following regular expression accepting COBOL identifiers.…

A: A = {A, B, C, ..., Z}a = {a, b, c, ..., z}d = {0, 1, 2, ..., 9}

Q: 7. Find dfa's for the following languages on E = {a, b}. (a) L= {w: [w| mod 3 = 0}. (b) L = {w: Jw|…

A: The Answer is

Q: ourse Name: Theory of Automata Requirement: Plz don't copy the answer from google Q. Construct a…

A: This expression can produce strings and those strings can be verified to some given patterns by…

Q: 1.6 Give state diagrams of DFAS recognizing the following languages. In all parts the alphabet is…

A: Hey, since multiple sub-parts questions posted, we will answer first three question according to our…

Q: Write a CFG to represent the expressions of a programming language with following characteristics:.…

A: GIVEN: Operators : + (addition), * (Multiplication) Alphabets: a, b Digits: 0, 1 Expression: S, this…

Q: 4. Describe the language denoted by the following regular expressions and design finite automata…

A: Given: Here we need to design finite automata based on the language given in the above question: (a)…

Q: Let α = (a + b)∗ab(a + b)∗. Give a regular expression equivalent to ∼ α in the following cases.…

A: SUMMARY: -Hence, we discussed all the points.

Q: 6. Show that the following language is decidable: {{N, R) : N is an NFA and R is a regex and L(N) #…

A: The solution to the given question is: Decidable problems- A problem is said to be decidable if a)…

Q: Give regular expressions for the following languages. (a) L1 = {anbm, n ≥ 4, m ≤ 3} (b) L2 = {anbm…

A: (a) L1 = {anbm, n ≥ 4, m ≤ 3} (b) L2 = {anbm : n < 4, m ≤ 3}

Q: Q: Build FA’s for the following languages. a + b)*(a + bb)

A: DFA Given Expression: a+b*a+bb All strings of language end with a or bb over {a, b}. Transition…

Q: Find regular expressions for the languages accepted by the following automata b a b

A: To find the regular expression we need to delete states one by one

Q: Given the alphabet as {0, 1}, write a DFA for the following three regular languages. (Give the…

A: Hey, since there are multiple questions posted, we will answer the first question. If you want any…

Q: Construct a regular expression defining each of the following languages over the alphabet I = {a, b}…

A: Actually, given question regarding regular expression .

Q: Find the regular expressions describing the following languages defined over the alphabet Σ = {0,1}:…

A: answer to the above question is in step2

Q: (3) Write the grammars for the following languages. L = {a"b"c' n ≥ 1,i ≥ 0} L₂ = {a'b"c" |n≥ 1,i≥…

A: The solution to the given question is:

Q: For Σ = {a, b} find regular expressions for the complement of the following languages: a)L =…

A: a)L = L(aa*bb*)

Q: 2. For each of the following languages, draw an FA accepting it. a (a, b)*{a) b. (bb, ba)* c. (a,…

A: As per the answering guidelines, solving the first 3 sub question.

Q: Question No.6: Construct PDA for the following languages. a) L= {a"b"c*+" | m, n € N} b) L= {a"b"+l…

Q: (3) Write the grammars for the following languages. L = {a"b"c' |n2 1,i > 0} L, = {a'b"c" |n > 1, i…

A: 3.

Q: 12. Find regular expressions for the languages accepted by the following automata. a a b. 9o

A: Question:

Q: 1. a) Define finite automaton. Design a five-state machine which accepts all strings that start and…

A: Here we are going to define what is finite automata and also draw finite automata for given…

Q: Find regular expressions for the languages accepted by the following automata. (a) a b a a a

A: Definition: Regular Expression: It is a particular order of the characters which is used for…

Q: formal languages and computability Which of the listed statements are true for pushdown automata?…

A: Finite Automata: Finite automata is a type of machine that is used to recognize the patterns in…

Q: Hello! I'm trying to create Turing Machine transition tables (and diagrams) for the following…

Q: npda that accepts the language L = {a nbm : n ≥ 0, n ≠ m}

A: Automata theory is the study of an abstract machine and computational problems, also it is a…

Q: 1- Draw an NPDA for the following languages e) L= {anb2n, n>0} f) L= {a²b", n20} g) L= {ww),…

A: As per our guidelines, only 3 sub parts will be answered. So, please repost the remaining questions…

Q: Build a multi-stack Push Down Automata (PDA) to accept the language {anbnanbn | n≥1} over Σ={a,b}.…

A: Approach: We can clearly see that the language is not possible to be constructed by a Single stack…

Q: Prove or disprove the following statements. a. {0^2j 1^3k | j, k > 0} is a regular language. b. {1^i…

A: We are given two language statements and we are going to prove if they are regular language and…

Q: S digit digit digit

A: The given finite automata as shown below.

Q: Let M be the PDA defined by Q = {q, q0 , q1 , q2 }, Σ = {a,b}, Γ = {a}, F := {q , q1}. δ(q0 , a ,…

A: Answer :

Q: xy : x and y are binary strings with a common substring of length 2

A: Actually, NFA stands for Non Deterministic Finite Automata.

Q: 2. Write down the relation between Finite Automata and Regular Expression. Convert the following…

A: We are going to understand the relationship between finite automata and regular expression and I am…

Q: 3. (.) Build the intersection machine for the two following languages described by the two following…

A: 3.

Q: Write a CFG to represent the expressions of a programming language with following characteristics: •…

A: GIVEN: Operators : + (addition), * (Multiplication) Alphabets: a, b Digits: 0, 1 Expression: S, this…

Q: Give regular expressions for the following languages. (a) L1 = {anbm, n ≥ 4, m ≤ 3} (b) L2 = {anbm…

A: Regular Expressions: Regular expressions are exist for the regular languages. Regular expression…

Q: 1. Let L be a language defined over a unary alphabet = {0}: L = {0* | k = 0 mod 2 or k = 0 mod 3}…

Q: This is not a writing assignment but keeps getting rejected for one. Please help me draw this…

A: Given strings are (a) (01)∗111, Σ = {0, 1} (b) (111)∪(01)∗ , Σ={0,1} Inputs {0,1}

Q: Let the language L be defined by the following non-logical symbols: two function symbols f1,1; f2,1,…

Q: 10. Find regular expressions for the languages accepted by the following automata. (a) (b) b

Question

Describe the following regular expressions:

1) a (a+b)*abba

2) (0+1)* 1 (0+1)* 11 (0+1)*

Prove the following language is not regular:

L = aⁿbⁿc^m , where n>=1, m<=7

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

Describe the languages that the following regular expressions generate. Keep in mind that a ‘+’ is thesame as a ‘∪’.(a) 01(1 + 0)∗(b) 0(0 + 1)∗ + (0 + 1)∗1(c) (1 + 01)∗(0 + ε)
Find the regular expressions describing the following languages defined over the alphabet Σ = {0,1}: L2 = {x : |x| mod 3 = 0}
Find the regular expressions describing the following languages defined over the alphabet Σ = {0,1}:L3 = {pqp : p,q ∈ {0,1}* and | p | = 3}
Not handwritten Find dfa's that accept the following languages. (c) L ((abab)* + (aaa* + b)*).
a) Give regular expressions for the following languages: 1) {w ∈ {0, 1}∗ | w contains at least twice either 001 or 100 as a substring}2) {w ∈ {0, 1}∗ | w does not contain 101 as a substring} b) Construct DFAs for both the Languages discussed in the PART (a) c) Construct DFA for RE = (a | b) + ( ba | ab )* + ( ε | aa | bb )+ Please solve the above questions, Thank you.
Please write down the regular expression for the language that can be accepted by the following automata (note here digit could be any digit between 0-9):
Hi, Need help in Automata Please, Regards 1) Give the regular expressions for the following languages; L1 = {anbm, n>=3, m<=4}
Write down regular expressions for the following languages.(a) {w ∈ {0, 1}^∗: w does not end in 101} (b) {w ∈ {a, b, c}^∗ : w starts with abba and ends in bac} (c) {w ∈ {a, b}^∗: the number of as in w is 1 more than a multiple of 3}
regular expressions Exercise: Describe the languages denoted by the following regular expressions: ◦a) a(a|b)*a..a) a*ba*ba*ba*.b) (aa|bb)*((ab|ba)(aa|bb)*(ab|ba)(aa|bb)*)*. and gave me example for a and b contain 20 String
Convert the following automata to regular expressions. (Show step by step No need to simplify the regular expressions)
Give regular expressions for the following languages. (a) L1 = {anbm, n ≥ 3, m ≤ 4} (b) L2 = {anbm : n < 4, m ≤ 4}
The objective: understand how regular expressions represent regular languages Q1) What languages correspond to the following regular expressions? a*b (aaa + bba) (ab)*