Let \( B \) be the language defined as follows:\[ B = \{ \, www \mid w \in \{a, b\}^* \, \} \]Let \( p \) be a positive integer and \( k \) be a nonnegative integer.Then the string \( a^p k b^p a^b \) is in \( B \) if and only if _________.- \( k < p \)- \( k > 0 \)- \( k = 0 \)- \( k = p \)

The value of ap-kbapbapb depends on value of p and k. According to the language w belongs to (a, b)…

Answered: Let B be the language defined as…

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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Write a function cyclic_toptail() which takes a single argument sentence in the form of a non-empty string, and returns True if ll words in sentence start with the final letter of the word that precedes them (including the first letter of the first word being the same as the last letter of the last word), and False otherwise. You may assume that sentence is all lowercase, does not contain any punctuation, and that words are separated by spaces. For example, in the case of sentence being "giraffes sing", the function should return True, as: (a) the first word ("giraffes") ends in the same letter as the first letter of the second word ("sing"), i.e. s; and (b) the first letter of the first word is the same as the last letter of the last word, e.g. g. In the case of "giraffes sulk", on the other hand, the function should return False, as the first letter of the first word (g) is not the same as the last letter of the last word (k). Example calls to the function are: >>»…
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The correct statements are: If L₁ and L2 are not regular languages, then L₁ U L₂ cannot be regular. If L₁ and L₂ are regular languages, then L₁ L₂ = {w: w€ (L₁-L₂) or w€ (L₂-L₁)} is regular. It is possible that the union of a regular language and a nonregular language is regular. Every subset of a regular language is regular.
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Let B be the language defined as follows: B = { www| we {a, b}*} Let p be a positive integer and k be a nonnegative integer. Then the string aP-kbaPbaPb is in B if and only if Ok0 O k =0 O k =p