![a. SublactiTlnb b. division of nonzero rationals c. function composition of polynomials with real coefficients d. multiplication of 2 × 2 matrices with integer entries e. exponentiation of integers 3. Which of the following binary operations are commutative? a. substraction of integers b. division of nonzero real numbers c. function composition of polynomials with real coefficients d. multiplication of 2 × 2 matrices with real entries e. exponentiation of integers 4. Which of the following sets are closed under the given operation? a. 10, 4, 8, 12) addition mod 16 b. [0, 4, 8, 12) addition mod 15 c. (1, 4, 7, 13] multiplication mod 15 d. (1, 4, 5, 7) multiplication mod 9 5. In each case, find the inverse of the element under the give operation. a. 13 in Z 20](http://img.homeworklib.com/questions/82225350-d487-11ea-8eb3-93bcaf69a0b3.png?x-oss-process=image/resize,w_560)
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a. SublactiTlnb b. division of nonzero rationals c. function composition of polynomials with real...
Exercise 4.1: Explain/prove why the following sets and binary operations do not define groups (so just...
Exercise 4.1: Explain/prove why the following sets and binary operations do not define groups (so just try to determine one group axiom that fails to hold): 1) The set of polynomials of odd degree under addition. 2) The set of polynomials of odd degree under multiplication 3) The set of integers congruent to 1 modulo 11, under addition modulo 11. 4) The set of integers modulo 11, under multiplication modulo 11. 5) The set of nonzero integers modulo 4, under...
Exercise 5.2: Identify the identity elements in the following sets. 1) The group of integral polynomials...
Exercise 5.2: Identify the identity elements in the following sets. 1) The group of integral polynomials under addition. 2) The group of integral polynomials under multiplication. 3) The set of integral polynomials under composition. 4) The set SL3(Z) (that is, matrix entries are integers). 5) The set SL3(R) (matrix entries are real numbers). 6) The set SL3C) (matrix entries are complex numbers).
Problem 5. The Gaussian rationals are the subset Q(i)-(a + bi : a, b Q) C...
Problem 5. The Gaussian rationals are the subset Q(i)-(a + bi : a, b Q) C C of the complex numbers, where Q is the set of rational numbers. Show that Q(i) is a field. (The addition and multiplication operations are the ordinary addition and multiplication of complex numbers. You may assume C is a field, so you need not worry too much about things like associativity of addition. Show that the Q(i) is closed under addition and multiplication and...
1,(Z) = { a bla, b, c, d. Let M2(Z) = a, b, c, d e...
1,(Z) = { a bla, b, c, d. Let M2(Z) = a, b, c, d e Z} with matrix addition and multiplication. Which of the following is true: it is a commutative ring with unity it is a ring with unity but not commutative it is a ring without unity and not commutative it is a commutative ring without unity Question 4 Which of the following statement is true about the ring of integers (with usual addition and multiplication) the...
1 1 point Consider the following algorithm for factoring an integer N provided as input (in...
1 1 point Consider the following algorithm for factoring an integer N provided as input (in binary): For i = 2 to [VN.17 i divides N, then output (i, N/). Which of the following statements is true? This algorithm is correct, but it runs in exponential time. This algorithm is not correct, because it will sometimes fail to find a factorization of Neven if N is composite This algorithm runs in sub-linear time, and always factors N it Nis composite...
Question 2 please Exercise 1. Define an operation on Z by a b= a - b....
Question 2 please
Exercise 1. Define an operation on Z by a b= a - b. Determine ife is associative or commutative. Find a right identity. Is there a left identity? What about inverses? Exercise 2. Write a multiplication table for the set A = {a,b,c,d,e} such that e is an identity element, the product is defined for all elements and each element has an inverse, but the product is NOT associative. Show by example that it is not associative....
please provide with full working solution. thank you Consider the set B of all 2 x 2 matrices of the form {C 9 b a B...
please provide with full working solution. thank you
Consider the set B of all 2 x 2 matrices of the form {C 9 b a B a, b e R -b a and let + and . represent the usual matrix addition and multiplication. (a) Determine whether the system B = (B, +,.) is a commutative ring. (b) Determine whether the system B = (B, +, .) is a field. T
Consider the set B of all 2 x 2...
1. Let Q be the set of polynomials with rational coefficients. You may assume that this...
1. Let Q be the set of polynomials with rational coefficients. You may assume that this is an abelian group under addition. Consider the function Ql] Q[x] given by p(px)) = p'(x), where we are taking the derivative. Show that is a group homomorphism. Determine the kernel of 2. Let G and H be groups. Show that (G x H)/G is isomorphic to H. Hint: consider defining a surjective homomorphism p : Gx HH with kernel G. Then apply the...
Question 2. Recall that a monoid is a set M together with a binary op- eration...
Question 2. Recall that a monoid is a set M together with a binary op- eration (r,y) →エ. y from M × M to M, and a unit element e E/, such that: . the operation is associative: for all x, y, z E M we have (z-y): z = the unit element satisfies the left identity axiom: for all r E M we have the unit element satisfies the right identity axiom: for all a EM we Let K...
Question 1 (10 Marks) This question consists of 10 true false ansers. In cach ease, answer true i...
Question 1 (10 Marks) This question consists of 10 true false ansers. In cach ease, answer true if the statement is always true and false otherise. If a statement is false, 1. The set rER0 isa group under the binary operation o defined ad-be is a group under matrix addition. 3. Tho sot eRzs not an Abelian group under the binary erplain why. There is no need to show working for true statements. by a ob vab. 2. The set...
Exercise 4.1: Explain/prove why the following sets and binary operations do not define groups (so just try to determine one group axiom that fails to hold): 1) The set of polynomials of odd degree under addition. 2) The set of polynomials of odd degree under multiplication 3) The set of integers congruent to 1 modulo 11, under addition modulo 11. 4) The set of integers modulo 11, under multiplication modulo 11. 5) The set of nonzero integers modulo 4, under...
Exercise 5.2: Identify the identity elements in the following sets. 1) The group of integral polynomials under addition. 2) The group of integral polynomials under multiplication. 3) The set of integral polynomials under composition. 4) The set SL3(Z) (that is, matrix entries are integers). 5) The set SL3(R) (matrix entries are real numbers). 6) The set SL3C) (matrix entries are complex numbers).
Problem 5. The Gaussian rationals are the subset Q(i)-(a + bi : a, b Q) C C of the complex numbers, where Q is the set of rational numbers. Show that Q(i) is a field. (The addition and multiplication operations are the ordinary addition and multiplication of complex numbers. You may assume C is a field, so you need not worry too much about things like associativity of addition. Show that the Q(i) is closed under addition and multiplication and...
1,(Z) = { a bla, b, c, d. Let M2(Z) = a, b, c, d e Z} with matrix addition and multiplication. Which of the following is true: it is a commutative ring with unity it is a ring with unity but not commutative it is a ring without unity and not commutative it is a commutative ring without unity Question 4 Which of the following statement is true about the ring of integers (with usual addition and multiplication) the...
1 1 point Consider the following algorithm for factoring an integer N provided as input (in binary): For i = 2 to [VN.17 i divides N, then output (i, N/). Which of the following statements is true? This algorithm is correct, but it runs in exponential time. This algorithm is not correct, because it will sometimes fail to find a factorization of Neven if N is composite This algorithm runs in sub-linear time, and always factors N it Nis composite...
Question 2 please
Exercise 1. Define an operation on Z by a b= a - b. Determine ife is associative or commutative. Find a right identity. Is there a left identity? What about inverses? Exercise 2. Write a multiplication table for the set A = {a,b,c,d,e} such that e is an identity element, the product is defined for all elements and each element has an inverse, but the product is NOT associative. Show by example that it is not associative....
please provide with full working solution. thank you
Consider the set B of all 2 x 2 matrices of the form {C 9 b a B a, b e R -b a and let + and . represent the usual matrix addition and multiplication. (a) Determine whether the system B = (B, +,.) is a commutative ring. (b) Determine whether the system B = (B, +, .) is a field. T
Consider the set B of all 2 x 2...
1. Let Q be the set of polynomials with rational coefficients. You may assume that this is an abelian group under addition. Consider the function Ql] Q[x] given by p(px)) = p'(x), where we are taking the derivative. Show that is a group homomorphism. Determine the kernel of 2. Let G and H be groups. Show that (G x H)/G is isomorphic to H. Hint: consider defining a surjective homomorphism p : Gx HH with kernel G. Then apply the...
Question 2. Recall that a monoid is a set M together with a binary op- eration (r,y) →エ. y from M × M to M, and a unit element e E/, such that: . the operation is associative: for all x, y, z E M we have (z-y): z = the unit element satisfies the left identity axiom: for all r E M we have the unit element satisfies the right identity axiom: for all a EM we Let K...
Question 1 (10 Marks) This question consists of 10 true false ansers. In cach ease, answer true if the statement is always true and false otherise. If a statement is false, 1. The set rER0 isa group under the binary operation o defined ad-be is a group under matrix addition. 3. Tho sot eRzs not an Abelian group under the binary erplain why. There is no need to show working for true statements. by a ob vab. 2. The set...
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