Question

In: Advanced Math

Given a set S = {1, -1, i, -i} where i2 = -1 and with multiplication...

Given a set S = {1, -1, i, -i} where i2 = -1 and with multiplication * on this set,

  1. complete the following Cayley table:

*

1

i

-1

-i

1

1

-1

-i

i

i

-1

-1

-i

(b) Determine whether, or not, the operation * is a binary operation on S.

(c) Is * commutative on S?

(d) Investigate the following properties of binary operations for this operation on S:

i. Closed

ii. Identity

iii. Inverse

iv. Associativity

Solutions

Expert Solution


Related Solutions

You are given a set S of n real numbers where for each element x ∈...
You are given a set S of n real numbers where for each element x ∈ S, 1 < | x | < 10. You are also given a black box that returns true if there is some combination (x, y, z) ∈ S such that x · y = z. Say the black box returns only z. Write an O(n log n) algorithm to find x and y. In other words, given a set S with n real numbers...
Let S be the set of all ordered pairs of real numbers. Define scalar multiplication and...
Let S be the set of all ordered pairs of real numbers. Define scalar multiplication and addition on S by: α(x1,x2)=(αx1,αx2) (x1,x2)⊕(y1,y2)=(x1 +y1,0) We use the symbol⊕to denote the addition operation for this system in order to avoid confusion with the usual addition x+y of row vectors. Show that S, together with the ordinary scalar multiplication and the addition operation⊕, is not a vector space. Test ALL of the eight axioms and report which axioms fail to hold.
Suppose Mandy’s earnings are given by w(S, A) = (SA+1)^(1/2) , where S denotes years of...
Suppose Mandy’s earnings are given by w(S, A) = (SA+1)^(1/2) , where S denotes years of schooling and A denotes ability. Assume that Mandy lives forever, discounts future income at a rate of r, earns nothing while in school, and supplies labor inelastically thereafter. Assume that A is exogenous and time is continuous, Mandy’s objective is to choose S to maximize the present value of lifetime earnings. (a) Calculate Mandy’s present value of lifetime earnings. (b) Find Mandy’s optimal choice...
H2+2IBr→2HBr+I2 Time (s) I2 concentration (M) 5 1.44 15 1.6 I have already figured out that...
H2+2IBr→2HBr+I2 Time (s) I2 concentration (M) 5 1.44 15 1.6 I have already figured out that the rate of formation of I2 is .016 and the rate of formation of HBr is 0.032. but now they are asking - what is the average rate of change of H2? Remember that reactant concentrations decrease over time. And I am confused how do I solve for a reactant?
Define multiplication on ℤ? by ? ⊙ ? = ? where ? is the remainder when...
Define multiplication on ℤ? by ? ⊙ ? = ? where ? is the remainder when the product ?? is divided by ?. (a) Show that this operation is commutative. (b) Show that this operation is associative. (c) Show that there is an identity element for this operation. (d) Show that for ? = 5, the set of non-zero elements forms a group under multiplication. (e) Show that for ? = 6, the set of non-zero elements does not form...
Given that α (alpha) is an upper bound of a given set of S of real...
Given that α (alpha) is an upper bound of a given set of S of real numbers, prove the following are equivalent: α = sup(S) α ∈ cl(A)
I was given a sample data set of systolic blood pressures and was asked to 1.)...
I was given a sample data set of systolic blood pressures and was asked to 1.) calculate: the mean, median, standard deviation, interquartile range and 2.) applied what I have learned in the course to describe or comment on the systolic blood pressures data. minimum : 86.0 maximum : 267.0 mean: 140.2 median: 137.0 standard deviation: 22.92012 Q1: 123.0 Q3: 154.0 After calculating the IQR with lower limit of 76.5 and upper limit of 200.5, I stated that given the...
Suppose that the random variable Y1,...,Yn satisfy Yi = ?xi + ?i i=1,...,n. where the set...
Suppose that the random variable Y1,...,Yn satisfy Yi = ?xi + ?i i=1,...,n. where the set of xi are fixed constants and ?i are iid random variables following a normal distributions of mean zero and variance ?2. ?a (with a hat on it) = ?i=1nYi xi  /  ?i=1nx2i is unbiased estimator for ?. The variance is  ?a (with a hat on it) = ?2/  ?i=1nx2i . What is the distribation of this variance?
Given two sets S and T, the direct product of S and T is the set...
Given two sets S and T, the direct product of S and T is the set of ordered pairs S × T = {(s, t)|s ∈ S, t ∈ T}.Let V, W be two vector spaces over F. (a) Prove that V × W is a vector space over F under componentwise addition and scalar multiplication (i.e. if (v1, w1),(v2, w2) ∈ V × W, then (v1, w1) + (v2, w2) = (v1+w1, v2+w2) and a(v, w) = (av, aw)...
Consider the group G = {1, −1, i, −i, j, −j, k, −k} under multiplication. Here...
Consider the group G = {1, −1, i, −i, j, −j, k, −k} under multiplication. Here i2= j2= k2= ijk = −1. determine which of the following sets is a subgroup of G. If a set is not a subgroup, give one reason why it is not. (a) {1, −1} (b) {i, −i, j, −j} (c) {1, −1, i, −i} (d) {1, i, −i, j}
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT