Linear Algebra question: If A, B are square matrices and AB is invertible (Inverse), prove that A and B are invertible (Inverse).
(a) If A is invertible and AB = AC, prove quickly that B = C. (b) If A-| | find two different matrices such that AB = AC.
8. let salle &]: xy, 2 e R} a). Prove that (5, +,-) is a ring, where t' and are the usual addition and multiplication of matrices. (You may assume standard properities of matrix Operations ) b). Let T be the set of matrices in 5 of the form { x so]. Prove that I is an ideal in the ring s. c). Let & be the function f: 5-71R, given by f[ 8 ] = 2 i prove that...
If Matrix A, r(A)=n, prove that r(AB)=r(B), for any B nxp, and show that for any invertible mxm matrix P, there exists Q mxn with full rank such that A=PQ
PLEASE PROVE PARTS a and b by CONTRADICTION
and solve for c as well! Could you explain your steps as well
2. (a) (10 marks) Suppose A is an n x n real matrix. Show that A can be written as a sum of two invertible matrices. HINT: for any lER, we can write A = XI + (A - XI) (b) (10 marks) Suppose V is a proper subspace of Mnn(R). That is to say, V is a subspace,...
Suppose A and B are matrices with matrix product AB. If bi, b2, ..., br are the columns of B, then Ab, Ab2, ..., Ab, are the columns of AB 1. Suppose A is an nxnmatrix such that A -SDS where D diag(di,d2,... dn) is a diagonal matrix, and S is an invertible matrix. Prove that the columns of S are eigenvectors of A with corresponding eigenvalues being the diagonal entries of D Before proving this, work through the following...
11. Prove one of the following: a. Let A and B be square matrices. If det(AB) + 0, explain why B is invertible. b. Suppose A is an nxn matrix and the equation Ax = 0 has a nontrivial solution. Explain why Rank A<n.
44. a.Let A and B be two 2 × 2 matrices,Let Tr denote the trace and det denote the determinant. Prove that Tr(AB)-Tr(BA) and det(AB) - det(BA). b. If A is any matrix in SLa(R), prove that det ((-A-t +1 where t = Tr(A).
44. a.Let A and B be two 2 × 2 matrices,Let Tr denote the trace and det denote the determinant. Prove that Tr(AB)-Tr(BA) and det(AB) - det(BA). b. If A is any matrix in SLa(R), prove...
Q4. For general linear transformations f : R is invertible and g-fo f, prove that g is invertible if f [4 marks Q5. For general inear transformations f:RR and g - fo f, prove that f is invertible if g is invertible (the converse of Q4). Hint: use Theorem 2.3.15 and Corollary 2.3.18 from the coursebook.] [6 marks]
Q4. For general linear transformations f : R is invertible and g-fo f, prove that g is invertible if f [4 marks...
10. Prove the following theorem Theorem 1 Let H and H denote the input-output transfer functions for the continuous time systems associated with state matrices (A, B, C) and (A, B,C), respectively. Thus the systems have state representations (t) = Ar(t)+Bu(t) t)C(t) 1(t y(t) and Ci(t) = Assume system (A B. C) and (A. B,C) are equivalent representations, and hence there erists an invertible matriz P such that i(t) = Pa (t) defines a coordinate transformation between the two systems...