x Bird(x)=Can- Fly(x) This universal quantifier used here implies thatOa.All reptiles cannot flyOb All that flies is a BirdAll Birds can flyOc.All chicken are birdsOd.

Answered: * Bird(x)Can-Fly(x) This universal…

* Bird(x)Can-Fly(x) This universal quantifier used here implies that a. All reptiles cannot fly All that flies is a Bird Ob. All Birds can fly Oc. All chicken are birds d.

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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X Bird(x)=Can- Fly(x) This universal quantifier used here implies that All reptiles cannot fly Oa. Ob. Ob. All that flies is a Bird All Birds can fly Oc. All chicken are birds d.
Formal Specification Predicate Logic By quantificationA quantifier is a mechanism for specifying an expression about a set of values. Thereare three quantifiers that we can use, each with its own symbol:–The universal quantifier ∀This quantifier enables a predicate to make a statement about all the elements ina particular set. For example, if M(x) is the predicate x chases mice, we could write:∀x Cats ● M(x)This reads For all the x which are members of the set Cats, x chases mice, or, moresimply, All cats chase mice.– The existential quantifier ∃In this case, a statement is made about whether or not at least one element of a setmeets a particular criterion. For example, if, as above, P(n) is the predicate n is aprime number, then we could write:∃n ● P(n)This reads There exists an n in the set of natural numbers such that n is a primenumber, or, put another way, There exists at least one prime number in the set ofnatural numbers.–The unique existential quantifier !This quantifier…
True or False 1. Matrices are often represented by single small letters a, b, c... etc.2. Two m x n matrices A and B are equal if aij=bij for each i & j. (i.e., the two matrices havesame size, and all the corresponding elements are equal).3. Matrices A & B are said to be conformable in the order AB if, and only if, the number ofrows in A is equal to the number of columns in B.4. Suppose Matrix A is having 4 rows and 3 columns, and Matrix B is having 3 rows and 2columns. The product size of AB is a 4 x 2 matrix.5. Suppose B is the matrix obtained from an n x n matrix A by multiplying the entries in arow/column by a non-zero constant and adding the result to the corresponding entries inanother row/column. Then, det(B) = det(A).
Use the Pumping Lemma to show the following language L is NOT regular. L= {w E (a, b, c}* ; where w has equal number of a's, b's, and c's}
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Quadratic Root Solver For a general quadratic equation y = ax? + bx + c, the roots can be classified into three categories depending upon the value of the discriminant which is given by b2 - 4ac First, if the discriminant is equal to 0, there is only one real root. Then, if the discriminant is a positive value, there are two roots which are real and unequal. The roots can be computed as follows: -b+ Vb? – 4ac 2a Further, if the discriminant is a negative value, then there are two imaginary roots. In this case, the roots are given by b ь? - 4ас 2a 2a Programming tasks: A text file, coeff.txt has the following information: coeff.txt 3 4 4 4 1 4 Each line represents the values of a, b and c, for a quadratic equation. Write a program that read these coefficient values, calculate the roots of each quadratic equation, and display the results. Your program should perform the following tasks: • Check if the file is successfully opened before reading • Use loop to read the file from main…
PERFECT CUBES AND SQUARES PROBLEMSThe product of some integer with itself is called a perfect square. A perfect cube isthe result of multiplying an integer three times by itself. Assume that a perfectcube greater than 2000 is considered a large perfect cube, the ones between 500and 2000 (inclusive) are medium perfect cubes and the ones below 500 are smallprefect cubes. A perfect cube is associated with a perfect square if the sameinteger is either cubed or squared i.e. the perfect square 4 (2x2) is associated withthe perfect cube 8 (2x2x2)Write a program which:1. Asks the user to enter a perfect square.2. Finds the associate perfect cube.3. Determines whether the found perfect cube is small, medium or large.4. Informs the user if the input is not a perfect square.5. Ask the user is they would like to continue or not. Use a while loop to dothis.For example,Example 1:Enter perfect square: 36216 is a small perfect cubeContinue (Y/N): YEnter perfect square: 4008000 is a large perfect…
Q2 – Simple Machine-Learning Function Java Program A Learning Function is an empirical formula which is responsible for regulating the training of an agentwith respect to Machine Learning and Artificial Intelligence (AI). In this regard, given below is ourprototype Learning Function, Z, which tunes and regulates the training as well as learning in our AIagents. This is defined such that: Z = y ∗ Ω Given that Ω = 0.567143 and y is a dynamic variable, which is defined with respect to the day of the week and the time of the day, as illustrated in the table below: Weekday/Time Day-Light Night-Time Monday 2.53 3.25 Tuesday 3.15 2.99 Wednesday 3.00 3.99 Thursday 2.41 2.68 Friday 1.99 3.73 Saturday 3.59 2.86 Sunday 2.00 2.59 Therefore, write a Java program correctly such that your source code will accomplish the following: 1. Display a prompt message for the user to enter the Weekday and the Time as a single input separated via the space character. Thus, valid inputs for…
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Required: Amitabh had a magical cat. That cat once fell down an empty well. As the walls of the well were not completely vertical, the cat could climb up the well. In one day, the cat can climb 1 unit height and the height of the well is h units. The cat starts at the bottom. Every day, a cat would divide into 2 cats. One of them would climb up 1 unit. The other would wait for help. But while waiting it would fall asleep and roll down 1 unit, unless it is already at the bottom, in which case it just remains there. When a cat would reach the top, it would run home toAmitabh. (Schrodinger doesn't know that some of the cats are in a well and so he can't rescue them). It has been d days since the cat fell into the well. How many cats would come out of the well today? You would notice that the number of cats grows very large with each passing day, so output the answer modulo 10^9+7. d = 0 means that the cat has fallen just now and so there's just one cat at the bottom of the well. So you…
f the domain consists of all integer numbers, then the truth value of ∃x(x2 = -1) is:
Bus timetables specify to the second the exact arrival and departure time of each bus on each stop. You need to pay for the full fare of every bus you ride and different bus lines charge different fees , but they are flat fees (independent of distance travelled on the line) A travel plan is a sequence of stop-time pairs where stop is a location of a bus stop and time is when we arrive at that stop. The plan is feasible if for any two consecutive pairs (a, t) and (b, t′) in the plan there exists a bus that departs after t and arrives at b at exactly t′. That is, a travel plan does not allow us to walk between stops. Assuming that no two buses arrive at the same time at the same stop, a feasible plan uniquely identifies the bus lines that we need to take to realize the plan. The cost of the plan is the sum of the fares we need to pay. Your task is to design an efficient algorithm that given a departure time t, an arrival time t′, an origin stop a and a destination stop b, finds the…