Question: The language L = { ww : w in { a , b } } is not context free. However, show that the complement language,

The language L ={ww : w in {a, b}} is not context free. However, show that the
complement language, L, is context free.
Provide a description of the complement language and then a full context-free grammar

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Q:

Show that the language L = {a^(k!) | k >= 0} is not context free. Also, Show that the language L = { a^(n) b^(j) | n = j^(2)} is context free. I. Show that the language L = {ak! k ol is not context...

Q:

Machine: Push Down Automata with 2 Stacks. Diagram: (Example) A Push Down Automata (PDA) with two stacks is a Septuple M = (K, , 1, 2, , s, F) K is the finite set of states is an alphabet (input...

Q:

Question 1 (20 point) For each of the following statements, state whether it is true or false by circling your answer. No explanation is required. 1. If L1 and L2 are regular languages, then L1 U L2...

Q:

Problem 1 Find a PDA that decides the language L (a"bn ; n 20). Find a context free grammar for L Problem 2 Find a PDA that decides the language L-(w ? {a,b)' : na(to)-2n6(w)). Find a context free...

Q:

Consider the language L = {w|w {0, 1}*, #0 (w) = #1 (w)}, here #30(w) and #1(w) means the numbers of Os and 1s in w respectively. That is, this is the language consisting of all strings with as many...

Q:

Write an alternative definition that is tail-recursive (iterative) and makes use of accumulator variables. [10 marks] Explain why your alternative definition executes more efficiently. [3 marks] 1...

Q:

Developments in Technology Light is incident from air on the end face of a multimode optical fibre at angle of incidence as shown below. n n 1 2 The refractive indices of the core and cladding are...

Q:

Question 4: a) Consider the language: L = {ww = a"b", n 21, m 22} Determine whether or not the language is regular. If it is, write a: 1. Finite state automaton accepting it. 2. Regular grammar...

Q:

5. [10 points] Let = {0, 1} and define a language L over as L = {0" 10" 10" : n> 1} Show that L is not context-free. Remark: Compare this with language Si on page 106, which is context free. Hint:...

Q:

Problem : For a language L, Substring(L) = {w : xwy L}. In other words, Substring(L) consists of any word that can be created by taking a word in L and removing letters from the beginning and end....

Q:

You have just leased a car that has monthly payments of $305 for the next 4 years with the first payment due today. If the APR is 5.4 percent compounded monthly, what is the value of the payments...

Q:

A risky asset has value 4, at time r. A probability measure R is defined so that Ay is an R-martingale, where v is calculated using the risk-free interest rate. Explain why R can be described as a...

Q:

EXERCISE 10-17. Conflict in Planning and Control Riemers Jewelry operates 45 stores in major shopping malls around the country, and Walter Chan is the manager of a store in Dallas. The company is in...

Q:

Compared with half a century ago, adoption has become _ _ _ _ _ _ _ _ _ common, but it is more open and acceptabl e , so we probably discuss it _ _ _ _ _ _ _ . fill in the blanks more or much less or...

Q:

LAST WORD Studies indicate that married men on average earn more income than unmarried men of the same age and education level. Why must we be cautious in concluding that marriage is the cause and...

Q:

What about leadership lessons from particularly good or bad bosses?

Q:

How would you assess the value of an approach like this?