Determine whether or not the following pairs of predicates are unifiable. If they are, give the most-general unifier and show the result of applying the substitution to each predicate. If they are not unifiable, indicate why. Assume that x, y, and z are variables, while other symbols are either predicates, constants, or functions.
a) P(B,A,B), P(x,y,z)
b) P(x,x), Q(A,A)
c) Older(Father(y),y), Older(Father(x),John).
d) Q(G(y,z),G(z,y)), Q(G(x,x),G(A,B)
e) P(f(x), x, g(x)), P(f(y), A, z)

Answers

Answer 1

Answer:

a) P(B,A,B), P(x,y,z)

=> P(B,A,B) , P(B,A,B}  

Hence, most general unifier = {x/B , y/A , z/B }.

b. P(x,x), Q(A,A)  

No mgu exists for this expression as any substitution will not make P(x,x), Q(A, A) equal as one function is of P and the other is of Q.

c. Older(Father(y),y), Older(Father(x),John)

Thus , mgu ={ y/x , x/John }.

d) Q(G(y,z),G(z,y)), Q(G(x,x),G(A,B))

=> Q(G(x,x),G(x,x)), Q(G(x,x),G(A,B))  

This is not unifiable as x cannot be bound for both A and B.

e) P(f(x), x, g(x)), P(f(y), A, z)    

=> P(f(A), A, g(A)), P(f(A), A, g(A))  

Thus , mgu = {x/y, z/y , y/A }.

Explanation:  

Unification: Any substitution that makes two expressions equal is called a unifier.  

a) P(B,A,B), P(x,y,z)  

Use { x/B}  

=> P(B,A,B) , P(B,y,z)  

Now use {y/A}  

=> P(B,A,B) , P(B,A,z)  

Now, use {z/B}  

=> P(B,A,B) , P(B,A,B}  

Hence, most general unifier = {x/B , y/A , z/B }  

b. P(x,x), Q(A,A)  

No mgu exists for this expression as any substitution will not make P(x,x), Q(A, A) equal as one function is of P and the other is of Q  

c. Older(Father(y),y), Older(Father(x),John)  

Use {y/x}  

=> Older(Father(x),x), Older(Father(x),John)  

Now use { x/John }  

=> Older(Father(John), John), Older(Father(John), John)  

Thus , mgu ={ y/x , x/John }  

d) Q(G(y,z),G(z,y)), Q(G(x,x),G(A,B))  

Use { y/x }  

=> Q(G(x,z),G(z,x)), Q(G(x,x),G(A,B))

Use {z/x}  

=> Q(G(x,x),G(x,x)), Q(G(x,x),G(A,B))  

This is not unifiable as x cannot be bound for both A and B  

e) P(f(x), x, g(x)), P(f(y), A, z)  

Use {x/y}  

=> P(f(y), y, g(y)), P(f(y), A, z)  

Now use {z/g(y)}  

P(f(y), y, g(y)), P(f(y), A, g(y))  

Now use {y/A}  

=> P(f(A), A, g(A)), P(f(A), A, g(A))  

Thus , mgu = {x/y, z/y , y/A }.


Related Questions

In this chapter, you learned that although a double and a decimal both hold floating-point numbers, a double can hold a larger value. Write a C# program named DoubleDecimalTest that declares and displays two variables—a double and a decimal. Experiment by assigning the same constant value to each variable so that the assignment to the double is legal but the assignment to the decimal is not.

Answers

Answer:

The DoubleDecimalTest class is as follows:

using System;

class DoubleDecimalTest {

 static void Main() {

     double doubleNum = 173737388856632566321737373676D;  

    decimal decimalNum = 173737388856632566321737373676M;

   Console.WriteLine(doubleNum);

   Console.WriteLine(decimalNum);  } }

Explanation:

Required

Program to test double and decimal variables in C#

This declares and initializes double variable doubleNum

     double doubleNum = 173737388856632566321737373676D;

This declares and initializes double variable decimalNum (using the same value as doubleNum)

     decimal decimalNum = 173737388856632566321737373676M;

This prints doubleNum

   Console.WriteLine(doubleNum);

This prints decimalNum

   Console.WriteLine(decimalNum);

Unless the decimal variable is commented out or the value is reduced to a reasonable range, the program will not compile without error.

as an IT manager write a memo to the student explaining the requirements of an ideal computer room


Answers

The correct answer to this open question is the following.

Memorandum.

To: IT class.

From: Professor Smith.

Date:

Dear students,

The purpose of this memorandum is to let you all know the requirements of an ideal computer room.

1.- The compute room should be a decent, large, space, ready to accommodate the number of students that are going to participate in class.

2.- The proper temperature levels. All the hardware can't stand too much heat. We need ventilators and the right temperature for safety purposes.

3.- The organization of the PCs on every desk must be precise in order to have enough room for everybody's participation and interaction.

4.- Have a proper fire suppression system in place. The risk of fire when working with electronics is considerable.

5.- Access control. The equipment is expensive and must be just for qualified students. Have the proper control-access system to keep the place safe.

Thank you for your attention.

With your cooperation, the computer room should be a place to learn and have fun learning new things.

Reverse Word Order: Write a program that reverses the order of the words in a given sentence. This program requires reversing the order of the words wherein the first and last words are swapped, followed by swapping the second word with the second to last word, followed by swapping the third word and the third to last words, and so on.

Answers

Answer:

function reverseArray(arr) {

   if (arr.length > 1) {

      arr = [arr[arr.length-1], ...reverseArray(arr.slice(1, -1)), arr[0]]

   }

   return arr;

}

function reverseSentence(sentence) {

   let words = reverseArray( sentence.split(" ") );

   return words.join(" ");

}

console.log( reverseSentence("The quick brown fox jumps over the lazy dog's back") );

console.log( reverseSentence("one two three") );

console.log( reverseSentence("one two") );

console.log( reverseSentence("Single") );

Explanation:

This is a solution in javascript leveraging several powerful constructs in that language, such as the spread operator.

A technician is able to connect to a web however, the technician receives the error, when alternating to access a different web Page cannot be displayed. Which command line tools would be BEST to identify the root cause of the connection problem?

Answers

Answer:

nslookup

Explanation:

Nslookup command is considered as one of the most popular command-line software for a Domain Name System probing. It is a network administration command-line tool that is available for the operating systems of many computer. It is mainly used for troubleshooting the DNS problems.

Thus, in the context, the technician receives the error "Web page cannot be displayed" when he alternates to access different web page, the nslookup command is the best command tool to find the root cause of the connection problem.

21
What does the following code print?
if 4 + 5 == 10:
print("TRUE")
else:
print("FALSE")
print("TRUE")
(2 Points)

Answers

Answer:

error

Explanation:

solve the average of 4 numbers and display fail if grade is below 60​

Answers

Need a better discription of the question to finalize an answer.

Write the algorithm for finding the perimeter of a rectangle using English like form step by step

Answers

L+L+W+W= Permiter
Or Lenght+Lenght+Width+Width= Perimeter
That’s all just add all the 4 sides

The compound known as butylated hydroxytoluene, abbreviated as BHT, contains carbon, hydrogen, and oxygen. A 1.501 g sample of BHT was combusted in an oxygen rich environment to produce 4.497 g of CO2(g) and 1.473 g of H2O(g). Insert subscripts below to appropriately display the empirical formula of BHT.

Answers

Answer:

C15H24O

Explanation:

n(C) = 4.497 g/44g/mol = 0.1022

Mass of C = 0.1022 × 12 = 1.226 g

n(H) = 1.473g/18 g/mol = 0.0823 ×2 moles = 0.165 moles

Mass of H = 0.0823 × 2 ×1 = 0.165g

Mass of O= 1.501 -(1.226 + 0.165)

Mass of O= 0.11 g

Number of moles of O = 0.11g/16g/mol = 0.0069 moles

Dividing through by the lowest ratio;

0.1022/0.0069, 0.165/0.0069, 0.0069/0.0069

15, 24, 1

Hence the formula is;

C15H24O

Answer

The formula is C1SH240

An attribute is a(n)?

Answers

Answer:

hjqnajiwjahhwhaiwnaoai

Answer:

Which I am not sure of as to what I want to watch a few years back in May but it is not part of Malvolio's that is not a big thing for the world of

Fill in the necessary blanks to list the name of each trip that does not start in New Hampshire (NH) Use the Colonial Adventure Tour Database listing found on the Canvas webpage under Databases or in the text.
SELECT TripName
FROM______
WHERE Trip____ ____NH:

Answers

Answer:

SELECT TripName

FROM AllTrips

WHERE Trip NOT LIKE ‘NH%'

Explanation:

Required

Fill in the blanks

The table name is not stated; so, I assumed the table name to be AllTrips.

The explanation is as follows:

This select the records in the TripName column

SELECT TripName

This specifies the table where the record is being selected

FROM AllTrips

This states the fetch condition

WHERE Trip NOT LIKE ‘NH%'

Note that:

The wild card 'NH%' means, record that begins with NHNot means opposite

So, the clause NOT LIKE 'NH%' will return records that do not begin with NH

or Java,
program to perform this computa
3.
Isaac Newton devised a clever method to casily approximate the square root of a number without having
to use a calculator that has the square root function. Describe this method with illustration​

Answers

Answer:

The illustration in Java is as follows:

import java.util.*;

import java.lang.Math.*;

class Main{

public static void main (String[] args){

 Scanner input = new Scanner(System.in);

 double num, root, temp;

 num = input.nextDouble();

 temp = num;

 while (true){

  root = 0.5 * ( (num / temp)+temp);

  if (Math.abs(root - temp) < 0.00001){

   break;   }

  temp = root;  }

 System.out.println("Root: "+root);

}}

Explanation:

This declares all necessary variables

 double num, root, temp;

This gets input for num (i.e the number whose square root is to be calculated)

 num = input.nextDouble();

This saves the input number to temp

 temp = num;

This loop is repeated until it is exited from within the loop

 while (true){

Calculate temporary square root

  root = 0.5 * ( (num / temp)+temp);

The loop is exited, if the absolute difference between the root and temp is less than 0.00001

  if (Math.abs(root - temp) < 0.00001){

   break;   }

Save the calculated root to temp

  temp = root;  }

This prints the calculated root

 System.out.println("Root: "+root);

Write a method that prints on the screen a message stating whether 2 circles touch each other, do not touch each other or intersect. The method accepts the coordinates of the center of the first circle and its radius, and the coordinates of the center of the second circle and its radius.

The header of the method is as follows:

public static void checkIntersection(double x1, double y1, double r1, double x2, double y2, double r2)


Hint:

Distance between centers C1 and C2 is calculated as follows:
d = Math.sqrt((x1 - x2)2 + (y1 - y2)2).

There are three conditions that arise:

1. If d == r1 + r2
Circles touch each other.
2. If d > r1 + r2
Circles do not touch each other.
3. If d < r1 + r2
Circles intersect.

Answers

Answer:

The method is as follows:

public static void checkIntersection(double x1, double y1, double r1, double x2, double y2, double r2){

    double d = Math.sqrt(Math.pow((x1 - x2),2) + Math.pow((y1 - y2),2));

    if(d == r1 + r2){

        System.out.print("The circles touch each other");     }

    else if(d > r1 + r2){

        System.out.print("The circles do not touch each other");     }

    else{

        System.out.print("The circles intersect");     }

}

Explanation:

This defines the method

public static void checkIntersection(double x1, double y1, double r1, double x2, double y2, double r2){

This calculate the distance

    double d = Math.sqrt(Math.pow((x1 - x2),2) + Math.pow((y1 - y2),2));

If the distance equals the sum of both radii, then the circles touch one another

    if(d == r1 + r2){

        System.out.print("The circles touch each other");     }

If the distance is greater than the sum of both radii, then the circles do not touch one another

   else if(d > r1 + r2){

        System.out.print("The circles do not touch each other");     }

If the distance is less than the sum of both radii, then the circles intersect

   else{

        System.out.print("The circles intersect");     }

}

A good CRM should Integrate marketing, sales, and customer support activities measuring and evaluating the process of knowledge acquisition and sharing.

Answers

The correct answer to this open question is the following.

Unfortunately, you forgot to include a question. Here, we just have a statement.

What is your question? What do you want to know?

If this is a true or false question, the answer is "true."

It is true that a good CRM should integrate marketing, sales, and customer support activities measuring and evaluating the process of knowledge acquisition and sharing.

The reason is that effective investment in Customer Relationship Management (CRM) should be able to operate efficientñy with these management aspects in order to increase the productivity and efficiency of the company.

A good CRM has to facilitate the operations of a company, improving time management and people's activities that can produce better results accomplishing the companies goals and fulfilling the key performing indicators (KPI)

What are 6 Steps in opening the print dialogue box in PowerPoint presentation​?

Answers

Answer:

Find the steps below.

Explanation:

The print dialogue box is the box that contains all the options to be selected before a hard copy of the power point presentation is obtained. The steps in opening it include;

1. Click on File to select the document to be printed

2. Click the Print icon

3. When the option Printer is displayed, choose the desired printer

4. Select Settings and choose the number of slides to print, the layout of the print-out, the color, and if the slides will be collated or not.

5. Select the number of copies to be printed

6. Click Print or Ok

What would be the result of the flooding c++ cide assuming all necessary directive
Cout <<12345
Cout< cout < Cout<< number <

Answers

Answer:

See explanation

Explanation:

The code segment is not properly formatted; However, I will give a general explanation and a worked example.

In c++, setprecision are used to control the number of digits that appears after the decimal points of floating point values.

setprecision(0) means; no decimal point at all while setprecision(1) means 1 digit after the decimal point

While fixed is used to print floating point number in fixed notation.

Having said that:

Assume the code segment is as follows:

number = 12.345;

cout<<fixed;

cout<<setprecision(0);

cout<<number <<endl;

The output will be 12 because setprecision(0) implies no decimal at all; So the number will be rounded up immediately after the decimal point

Write a Fortran Program to calculate area of a circle​

Answers

Explanation:

πr square

That's the formula for calculating area of a circle.

You are a high school student learning about computers and how to build them. As a class project, you have built a new computer. You power on your computer and begin to configure the system. After a short while, you notice smoke coming from the PC, and shortly after that, the computer stops working. After removing the computer case, you see that the CPU and surrounding areas are burnt and very hot. You realize that the costly mistake you made was not using a heat sink. When rebuilding your computer, which cooling systems would MOST efficiently remove heat from the CPU?

Answers

Answer:

You can use thermal paste, active heat sink, liquid pipes, and even a fan. These are just some that I've heard.

Explanation:

All of these are cooling and will stop the Central Processing Unit from overheating.

Hope this helps :)

When rebuilding your computer, the cooling systems which would most efficiently remove heat from the Central processing unit (CPU) are: cooling fan and thermal compounds.

A computer refers to an intelligent electronic device that is designed and developed to receive raw data as an input and then processes these data into an information (output) that is usable by an end user.

Basically, the main part of a computer are broadly divided into the following;

Input devices (peripherals). Output devices (peripherals). Motherboard. Memory and storage device.Central processing unit (CPU).

A cooling device can be defined as a device that is designed and developed to efficiently remove or dissipate heat from the inside of a computer. The cooing system used in a computer are grouped into two

(2) main categories and these are:

I. Active cooling device: an example is a cooling fan.

II. Passive cooling device: an example is a heat sink.

In conclusion, the cooling systems which would most efficiently remove heat from the Central processing unit (CPU) are cooling fan and thermal compounds.

Read more: https://brainly.com/question/10983152

HELP ITS A TESTTT!!!Which symbol shows auto correct is in use?

A-a white light bulb
B-A green plus sign
C-A flashing red circle
D-A yellow lightning bolt

Answers

After careful consideration the answer to this problem looks to be D

Answer:

D

Explanation:

who would win in a fight iron man or bat man​

Answers

IRON MANNNN MARVELLLL

Given 4 floating-point numbers. Use a string formatting expression with conversion specifiers to output their product and their average as integers (rounded), then as floating-point numbers. Output each rounded integer using the following: print('{:.0f}'.format(your_value)) Output each floating-point value with three digits after the decimal point, which can be achieved as follows: print('{:.3f}'.format(your_value))

Answers

Answer:

The program is as follows:

prod = 1

isum = 0

for i in range(4):

   num = float(input())

   prod*=num

   isum+=num

avg = isum/4

print('{:.0f}'.format(prod))

print('{:.3f}'.format(avg))  

Explanation:

This initializes the product to 1

prod = 1

..... and sum to 0

isum = 0

The following iteration is repeated 4 times

for i in range(4):

Get input for each number

   num = float(input())

Calculate the product

   prod*=num

Add up the numbers

   isum+=num

This calculates the average

avg = isum/4

Print the products

print('{:.0f}'.format(prod))

Print the average

print('{:.3f}'.format(avg))  

3. It is used to measure the resistance on ohms and voltage that flow in circuit both AC and DC current. A. Gadget C. Electrical tape B. Voltage D. Multi-tester VOM​

Answers

Answer:

the answer is D. Multi -tester VOM

It is used to measure the resistance on ohms and voltage that flow in the circuit both AC and DC current is D. Multi-tester VOM​.

What does an ammeter degree?

Ammeter, tool for measuring both direct or alternating electric powered modern, in amperes. An ammeter can degree an extensive variety of modern values due to the fact at excessive values most effective a small part of the modern is directed thru the meter mechanism; a shunt in parallel with the meter consists of the main portion. ammeter.

A multimeter or a multitester additionally referred to as a volt/ohm meter or VOM, is a digital measuring tool that mixes numerous size capabilities in a single unit. A traditional multimeter can also additionally encompass capabilities consisting of the capacity to degree voltage, modern and resistance.

Reda more about the Voltage:

https://brainly.com/question/24858512

#SPJ2

Write a program in Python representing 7 logic gates:

AND
NAND
OR
NOR
XOR
XNOR
NOT
Accept (only) two inputs to create all outputs.
Use the if statement to perform the Boolean logic.
Only accept numeric input.
If a number is greater than 0 treat it as a 1.
Specify in your output and in the beginning of the code (through print statements) which gate the code represents.
Comment your code.

Answers

Answer:

The program in python is as follows:

a = int(input("A: "))

b = int(input("B: "))

if a != 0:

   a= 1

if b != 0:

   b = 1

print("A AND B",end =" ")

if a == b == 1:

   print("True")

else:

   print("False")

print("A NAND B",end =" ")

if a == 0 or b == 0:

   print("True")

else:

   print("False")

print("A OR B",end =" ")

if a == 1 or b == 1:

   print("True")

else:

   print("False")

print("A NOR B",end =" ")

if a == 1 or b == 1:

   print("False")

else:

   print("True")

print("A XOR B",end =" ")

if a != b:

   print("True")

else:

   print("False")

print("A XNOR b",end =" ")

if a == b:

   print("True")

else:

   print("False")

print("NOT A",end =" ")

if a == 1:

   print("False")

else:

   print("True")

print("NOT B",end =" ")

if b == 1:

   print("False")

else:

   print("True")

Explanation:

These get inputs for A and B

a = int(input("A: "))

b = int(input("B: "))

a and b are set to 1 for all inputs other than 0

if a != 0:

   a= 1

if b != 0:

   b = 1

This prints the AND header

print("A AND B",end =" ")

AND is true if only A and B are 1

if a == b == 1:

   print("True")

else:

   print("False")

This prints the NAND header

print("A NAND B",end =" ")

NAND is true if one of A or B is 0

if a == 0 or b == 0:

   print("True")

else:

   print("False")

This prints the OR header

print("A OR B",end =" ")

OR is true if one of A or B is 1

if a == 1 or b == 1:

   print("True")

else:

   print("False")

This prints the NOR header

print("A NOR B",end =" ")

NOR is false if one of A or B is 1

if a == 1 or b == 1:

   print("False")

else:

   print("True")

This prints the XOR header

print("A XOR B",end =" ")

XOR is true if A and B are not equal

if a != b:

   print("True")

else:

   print("False")

This prints the XNOR header

print("A XNOR b",end =" ")

XNOR is true if a equals b

if a == b:

   print("True")

else:

   print("False")

This prints NOT header for A

print("NOT A",end =" ")

This prints the opposite of the input

if a == 1:

   print("False")

else:

   print("True")

This prints NOT header for B

print("NOT B",end =" ")

This prints the opposite of the input

if b == 1:

   print("False")

else:

   print("True")

Regarding the role played by the “victim” in deadlock resolution, give an example of such a deadlock in real life and explain your answers to these questions.

a. Describe how you might choose the victim to be removed and the consequences, both positive and negative, of that removal.

b. Describe the fate of the victim and the chances of eventually completing its processing.

c. Describe the actions required, if any, to complete the victim’s tasks. ​

Answers

Answer:

Here the answer is given as follows,

Explanation:  

The real-life situation of a deadlock resolution where a role is played by the victim is given as follows:  

Example: An example of such a situation are often a one-way lane where the flow of traffic is merely in a method. Thus, on just one occasion, the flow of traffic can enter one direction only. Each entrance/exit gate is often considered a resource. during this case, if two cars are coming from both the entrances and that they are often considered as two tasks, then one among the cars must copy or we will say hand over its resource in order that the opposite car gets the prospect to first cross the lane or we will say the opposite task gets executed.  

 a)  Victim: The steps which describe how a victim is chosen are given as follows :  

   The task which is terminated so as to interrupt things of deadlock is taken into account because of the victim.

There are often a variety of job pools that will be under a deadlock situation and therefore the victim is usually a low-priority task in order that the performance isn't affected that much and termination of this task doesn't cause any effect on the opposite jobs.

the main positive effect of selecting and terminating a victim is that things of deadlock are resolved and every one of the tasks can execute now.

The negative effect is that the task that's chosen because the victim is terminated and is executed at the previous. This whole process for choosing a victim then terminating it then restarting it again may consume some longer also.

b)  An easy deadlock priority is often set. this suggests that the victim’s task or the task is often terminated so as to interrupt the deadlock and other jobs can finish executing. After this, the task which is terminated are often later restarted and every one of the tasks can then execute without a deadlock.

 c) When employment gets terminated, the knowledge associated with it's stored. Are often This is often done in order that the work can be restarted again and therefore the information in it's not lost. Since the progress of the victim is stopped. Thus, the sole thanks to complete the victim’s task would be to start out it again. But before restarting the task, this must be considered that the victim’s task doesn't cause any deadlock within the system.  

What is the Best IPTV service provider in the USA?

Answers

Answer:

Comstar.tv.

Explanation:

Comstar.tv. Comstar.tv is the best IPTV provider offering HD 7300+ channels, 9600+ Movies and 24/7 on demand TV shows on your TV, Phone, Laptop or tablet.

which of the following is an example of how science can solve social problems?
It can reduce the frequency of severe weather conditions.
It can control the time and day when cyclones happen.
It can identify the sources of polluted water.
It can stop excessive rain from occurring.

Answers

Answer:

It can identify the sources of polluted water.

Explanation:

Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.

A scientific method can be defined as a research method that typically involves the use of experimental and mathematical techniques which comprises of a series of steps such as systematic observation, measurement, and analysis to formulate, test and modify a hypothesis.

An example of how science can solve social problems is that it can identify the sources of polluted water through research, conducting an experiment or simulation of the pollution by using a computer software application.

In conclusion, science is a field of knowledge that typically involves the process of applying, creating and managing practical or scientific knowledge to solve problems and improve human life.

Answer:

It can identify the sources of polluted water.

Explanation:

The purpose of a good web page design is to make it

Answers

Answer:

Hi , so your answer is that a good web page design is to make it easy to use and meaningful and able to help people .

Explanation:

Really hope i helped , have a nice day :)

Answer: helpful for everyone

Explanation:

some student need help  so then he can't find the answer in the other websites so it is department about communication

what represents the amount of data that travels along a network​

Answers

Answer:

byte

Explanation:

Answer:

Bandwidth is measured as the amount of data that can be transferred from one point to another within a network

Explanation:

name any two objectives of a business​

Answers

Explanation:

Growth – Another important objective of business is to achieve growth. The growth should be in terms of increase in profit, revenue, capacity, number of employees and employee prosperity, etc.

Stability – Stability means continuity of business. An enterprise or business should achieve stability in terms of customer satisfaction, creditworthiness, employee satisfaction etc. A stable organization can easily handle changing dynamics of markets.

Have you ever been presented to someone else's home page of a given website?​

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Answer: No, is this the question?

Explanation: Have a stupendous day! <3

Describe how data is transmitted using half-duplex serial data transmission.

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Answer:

In half duplex mode, the signal is sent in both directions, but one at a time. In full duplex mode, the signal is sent in both directions at the same time. In simplex mode, only one device can transmit the signal. In half duplex mode, both devices can transmit the signal, but one at a time.

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