Computers and Technology, 22.09.2020 03:01 lays20001
Let P(x, y) be a binary predicate where the type of x is A and the type of y is B. We define the projection π1(P) to be the unary predicate on A defined as follows: π1(P)(x) is true if and only if there exists an element y of B such that P(x, y) is true. Similarly, π2(P) is the unary predicate on B defined so that π2(P)(y) is true if and only if there exists an element x of A such that P(x, y) is true.
a. Let A = B = {0, 1, 2, 3} and define P(x, y) to mean "x < y". Describe π1(P) and π2(P) as both predicates and relations.
b. What can you say about the predicate P if you know that π1(P) and π2(P) are each always false? What if they are each always true?
c. Suppose you are given a boolean method isInP(int x, int y) where each of x and y are restricted to the range from 0 through LENGTH - 1. Write boolean methods that will return the value of the predicates π1(P) and π2(P), given appropriate input
Answers: 1
Computers and Technology, 21.06.2019 17:10
Write an application that allows a user to enter the names and birthdates of up to 10 friends. continue to prompt the user for names and birthdates until the user enters the sentinel value “zzz” for a name or has entered 10 names, whichever comes first. when the user is finished entering names, produce a count of how many names were entered, and then display the names. in a loop, continuously ask the user to type one of the names and display the corresponding birthdate or an error message if the name has not been previously entered. the loop continues until the user enters “zzz” for a name. save the application as birthdayreminder.java.
Answers: 1
Computers and Technology, 22.06.2019 22:40
In this lab, you complete a python program that calculates an employee's annual bonus. input is an employee's first name, last name, salary, and numeric performance rating. if the rating is 1, 2, or 3, the bonus rate used is .25, .15, or .1 respectively. if the rating is 4 or higher, the rate is 0. the employee bonus is calculated by multiplying the bonus rate by the annual salary.
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Computers and Technology, 23.06.2019 09:30
Light travels at a speed of 186,000 miles a second. the distance light travels in a year is 5,865,690,000,000 miles/year 5,865,695,000,000 miles/year 58,656,950,000,000 miles/year 6,789,000,0000 miles/year
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Computers and Technology, 24.06.2019 02:00
Read the following scenario, and then answer the question below. you want to send an e-mail to your boss requesting a meeting to discuss a raise. what is the best example of an e-mail to an employer about this meeting? “hey jason. can we chat about getting me more money soon? let me know. peace, meg.” “hello jason. pardon me for sending yet another e-mail today about my need to talk to you about my position and a possible pay increase. i am dying to know when you can talk. sincerely, meg.” “hello jason. i have been with the company for one year and have taken on more responsibilities than outlined in my job description. i would appreciate an opportunity to speak with you about my position. let me know when we can schedule a meeting. you, meg.” “greetings jason! i hope this e-mail finds you well and happy today. i really, really want to talk to you about something important. i am not sure if you have time. i hope you do. get back in touch with me and let me know when we might talk. ever so much for taking the time to read this. sincerely, meg.”
Answers: 3
Let P(x, y) be a binary predicate where the type of x is A and the type of y is B. We define the pro...
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