Consider the language consisting of Turing Machines that accept at least two different strings, X = {(M) | M is a Turing Machine that accepts at least two different inputs}. That is, (M) EX if and only if |L(M)| ≥ 2. 1. Show that X is Turing-recognizable. 2. Give a mapping reduction ATM ≤m X, and explain why it works. 3. What can we conclude about X from the fact that ATM ≤m X?
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- d, e, fThe equivalence of Exercise 43 says that if it is false that every element of the domain has property A, then some element of the domain fails to have property A, and vice versa. The element that fails to have property A is called a counterexample to the assertion that every element has property A. Thus a counter- example to the assertion (Vx)(x is odd) in the domain of integers is the number 10, an even integer. (Of course, there are lots of other counterex- amples to this assertion.) Find counterexamples in the domain of integers to the following assertions. (An integer x>1 is prime if the only factors of x are 1 and x.) a. (Vx)(x is negative) b. (Vx)(x is the sum of even integers) c. (Vx)(x is prime →x is odd) d. (Vx)(x prime →(-1)* = -1) e. (Vx)(x prime →2* – 1 is prime)In the Axiom Systems section of the Background chapter (1.6), a binary relationSuppose a and b are positive integers and 2021 a 2022 2022 b 2023 If s is the minimum value of a+b, what is the last digit of s? (A) 7 (B) 8 (C) 9 (D) 0Please just answer parts iv. and v.Label the following statement as True (T) or False (F): Let L be any Turing recognizable language. Then L is Turing recognizable.Find the complement of the following boolean functions and reduce them to minimum number literals, (1) (bc' + a'd) (ab' + cd') WA (ii) b'd + a'bc' + acd + a'bc owfen G1) Not all operators are commutative, namely, a*b = b*a. Consider functions under the operators addition, subtraction, multiplication, division, and composition. Pick two of the functions and use a grapher (like Desmos) to graph the functions under the operators. If the functions are commutative under the operator, the graphs should be identical (overlap everywhere) when you change the order in which the functions are entered with the operator. Determine which operators seem to the commutative and which operators seem not to be commutative using graphs as evidence. Explain what you learn. Some functions you might use are below. F(x) = 2x + 1 G(x) = x^2 +2x +1 H(x) = sin(x) I(x) = e^x J(x) = log(x) K(x) = 1/xC. Think of a set with m + n elements as composed of two parts, one with m elements and the other with n elements. Give a combinatorial argument to show that (*") = (") (;) + (")(,",) + (") (,"2) + . + (") (6) m+n m n m m(1.) Let T = {1, 2, 3, 4, 5, 6, 7, 8, 9}. Suppose five integers are chosen from T. Show that it is not true that there must be two integers whose sum is 10 by giving a counterexample. In other words, fill in the blank with five numbers from T, no two of which have a sum of 10. (Enter your answer in set-roster notation.) (2.) Suppose five pairs of similar-looking boots are thrown together in a pile. What is the minimum number of individual boots that you must pick to be sure of getting a matched pair? Why? Since there are 5 pairs of boots in the pile, if at most one boot is chosen from each pair, the maximum number of boots chosen would be............? . It follows that if a minimum of............. boots is chosen, at least two must be from the same pair.Exercise 1. Let 0 < ɛ ≤ 1, and 9] (i) Calculate the condition number of A in the 1-, 2- and ∞o-norms. (ii) How do the condition numbers behave as ɛ → 0? Why is this the case? A := 10 02. Let P (x, y be the statement "x and y work at the same company" and Q (,y be the statement "x and y uses the same programming language". Which of the following sentences expressses Ey ((x y) ^P (x,y) AQ (2,y)) OFor all companies, there exist two employees who uses the same language. OFor all employees using the same languages, there exist another employee who work at his cormpany. O For all employees of all companies, there exist another employee who uses the same language. OFor all emnployees, there exist another employee in the same company who uses the same language.SEE MORE QUESTIONS