4. Let M be the set of 2 x 2 matrices of the form (62) where a, d E R - {0}. Consider the usual matrix multiplication ·, i.e: ae + bg af + bh ce + dg cf + dh (a) Show that (M,·) is an abelian group. 1 (b) Compute the cyclic subgroup generated by M = What is the order of M? 66 -4) (1) EM EM.
#21. Let G be the set of all real 2 x 2 matrices where ad + 0, Prove that under matrix multiplication. Let N = (a) N is a normal subgroup of G. (b) G/N is abelian.
(e) Let GLmn(R) be the set of all m x n matrices with entries in R and hom(V, W) be the set of all lnear transformations from the finite dimensional vector space V (dim V n and basis B) to the finite dimensional vector space W (dimW m and basis C) (i) Show with the usual addition and scalar multiplication of matrices, GLmRis a finite dimensional vector space, and dim GCmn(R) m Provide a basis B for (ii) Let VW...
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. Show that the set of rational numbers of the form m /n, where m, n E Z and n is odd is a subgroup of QQ under addition. 2. Let H, K be subgroups of a group G. Prove: H n K is a subgroup of G 3. Let G be an abelian group. Let S-aEG o(a) is finite . Show that S is a subgroup of G 4. What is the largest order of a permutation in S10?...
I am not sure how to do
icu lact that thie muiiplication of matrices with real coefficients is associative. 1. Show that every cyclic group is abelian. 2. Let m be an integer greater than 1. For any l e Z, let Im denote the remain- der of the division of I by m. Let: Zm = {0. 1, 2, . . . ,m-1)- on Zm as follows: Define a binary operation where + is the usual addition of integers....
LO 2a 4) Let V be the set of diagonal 2x2 matrices of the form la ). Determine whether or not this set is a subspace of the set of all real-valued 2x2 matrices, M22, with standard matrix addition and scalar multiplication. Justify your answer.
I already solved part A and I just need help with part B
1. Matrix Multiplication The product of two n xn matrices X and Y is a third n x n matrix 2 = XY, with entries 2 - 21; = xixYk x k=1 There are n’ entries to compute, each one at a cost of O(n). The formula implies an algorithm with O(nº) running time. For a long time this was widely believed to be the best running...
16. Let Z(G), the center of G, be the set of elements of G that commute with all elements of G. (a) Find the center of the quaternions, defined in Example 19.16. (b) Find the center of Z5. (c) Show that Z(G) is a subgroup of G. (d) If Z(G) G, what can you say about the group G? b 0 Example 19.16 d We now work inside M2(C), the ring of 2 x 2 matrices with complex entries. Consider...
O Q 2 (C) Let S be the set of matrices of the form A= a az ag where a ja, are arbitrary real numbers. Show there exists a unique matrix such that A EA for all A in S.