Question: Problem 3. Consider finite strings over the alphabet S = {a,b,c,d}. The power operation represents string repetition, for example ab4c denotes the string aaabbbbc. Define

Problem 3. Consider finite strings over the alphabet S = {a,b,c,d}.

Problem 3. Consider finite strings over the alphabet S = {a,b,c,d}. The power operation represents string repetition, for example ab4c denotes the string aaabbbbc. Define a context- free grammar G generating the language L(G) = {w (Ei,j,k)w = ab(i+j+k)d"}, the set of words where the number of b's is the same as the number of all other letters together and the letters are ordered alphabetically. For example, the words ab, aaabbbbd, abbbed belong to the language, words abba, aabbbbbc, abc do not belong to the language. Justify your answers

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!

ttth Suppose that the sequence of bags {Bn | n N} is recursively enumerated by the computable function e(n, x) = fn(x), [7 marks] Hence prove that the set of all recursive bags cannot be recursively...

Briefly describe ASCII and Unicode and draw attention to any relationship between them. [3 marks] (b) Briefly explain what a Reader is in the context of reading characters from data. [3 marks] A...

resolved first by reducing the raw hash value modulo the size of the array and arranging that each array entry refers to the start of a linked list of (index,value) pairs. Retrieving a value from the...

A creative engineer suggests structuring the TLB so that not all the bits of the presented address need match to result in a hit. Suggest how this might be achieved, and what might be the costs and...

"Fortran, Algol and Lisp invented most programming language concepts 50 years ago; adding the concept of object-orientation suffices to explain all programming languages to date". To what extent is...

Consider an operating system that uses hardware support for paging to provide virtual memory to applications. (a) (i) Explain how the hardware and operating system support for paging combine to...

Let r and s be solutions to the quadratic equation x 2 b x + c = 0. For n N, define d0 = 0 d1 = r s dn = b dn1 c dn2 (n 2) Prove that dn = r n s n for all n N. [4 marks] (b) Recall that a commutative...

answer the question clearly (a) Write down an expression for the distribution Pr(n|) where n {1, . . . , 9}. [2 marks You are preparing to participate in a password-cracking competition. During the...

CONTEXT FREE GRAMMAR 1) easy cfg 2) tuple cfg 3) parsing cfg 4) undecidable 1. You are to give me a context free grammar to generate the language of all tuples of tuples and characters a, b, c. For...

MUST BE CORRECT ANSWERS A small software company has the following simplified cashflow, funded by shareholders' equity of 20,000 and a bank overdraft of 5000: Invoiced money received 2 months after...

EveryWear Ltd. (EveryWear) is a well-known South African clothing manufacturer and retailer with a nationwide footprint. While both EveryWears administration and manufacturing plant are located in...

1. Do you think it is ethically appropriately for Wanda David to provide tax services to Wiz, an audit client and customer of her employer, Gee, LLC, at the same time she works for the audit firm and...

Ethical Considerations. Is your privacy being violated when a website you visit displays ads that are personalized in any way, even if its just geographically targeted

Need some help with Finance! WILL RATE! A company is considering two mutually exclusive expansion plans. Plan A requires a $41 million expenditure on a large-scale integrated plant that would provide...

2. Trainees are geographically dispersed and travel costs related to training are high.

6. Current training methods allow limited time for practice, feedback, and assessment.

7. Use of new technology fits into the organizational culture or business strategy.