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19. Suppose A and B are n xn matrices. a. Suppose that both A and B...
2. In what follows, A, B denote two square matrices. Prove the follow- ing statements using...
2. In what follows, A, B denote two square matrices. Prove the follow- ing statements using the appropriate definitions. (a) If v is a common eigenvector to A and B, then v is also an eigen- vector of AB (b) If A is diagonalizable and B is similar to A, then B is also diago- nalizable.
vi) Suppose that A and B are two n × n matrices and that AB-A is...
vi) Suppose that A and B are two n × n matrices and that AB-A is invertible. Prove that BA-A is also invertible.
Let A = CD where C, D are n xn matrices, and is invertible. Prove that...
Let A = CD where C, D are n xn matrices, and is invertible. Prove that DC is similar to A. Hint: Use Theorem 6.13, and understand that you can choose P and P-inverse. Prove that if A is diagonalizable with n real eigenvalues 11, 12,..., An, then det(A) = 11. Ay n Prove that if A is an orthogonal matrix, then so are A and A'.
2. (5' each) Give short answers: (a) True or false: If Ai-Adi for some real number λ, then u is a...
linear algebra question
2. (5' each) Give short answers: (a) True or false: If Ai-Adi for some real number λ, then u is an eigenvector of matrix A. If a square matrix is diagonalizable, then it has n distinct real eigenvalues. Two vectors of the same dimension are linearly independent if and only if one is not a multiple of the other. If the span of a set of vectors is R", then that set is a basis of R...
Suppose A and B are matrices with matrix product AB. If bi, b2, ..., br are the columns of B, then Ab, Ab2, ..., Ab, ar...
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...
Let А and B be similar nxn matrices. That is, we can write A = CBC-...
Let А and B be similar nxn matrices. That is, we can write A = CBC- for some invertible matrix с Then the matrices A and B have the same eigenvalues for the following reason(s). A. Both А and A. Both А and B have the same characteristic polynomial. B. Since A = CBC-1 , this implies A = CC-B = IB = B and the matrices are equal. C. Suppose that 2 is an eigenvalue for the matrix B...
Suppose we have a quantum system with N eigenstates. Then we know the eigenstates can be...
Suppose we have a quantum system with N eigenstates. Then we know the eigenstates can be expressed as vectors, and operators can be represented by N × N matrices (a) Prove that (A)(A)where At is the transpose conjugate of matrix A. Here, A is not required to be Hermitian operator (Hint: express A and) in matrix and vector form. Use matrix calculation to show that (Αψ|U) is the same as 1Atlp.) (b) Prove that (ΑΒψ|U)-(ψ1BtAtlp). Á and B are not...
8: Suppose that A and B are similar matrices, B = p-1AP, where 6 2 P...
8: Suppose that A and B are similar matrices, B = p-1AP, where 6 2 P = -1 1 We know that A and B have the same characteristic polynomial and the same eigenvalues. Suppose that 2 is one of the common eigenvalues and x = [4 1] is a corresponding eigenvector of A. Which of the following is the eigenvector of B corresponding to 2 ? "f1-4-0-0-0-0-01-10 #8: Select
We say that A and B are similar matrices if A = SBS-1 for some invertible...
We say that A and B are similar matrices if A = SBS-1 for some invertible matrix S. Are the following true or false. Given a mathematical reason (proof). (a) If A and B are similar, then A and B have the same eigenvalues. Answer: (b) If A and B are similar, then A and B have the same eigenvectors. Answer: c) If A and B are similar, then A - 51 and B – 51 are similar. Answer: (d)...
3. Let A and B be any nxn matrices. Suppose ū is an eigenvector of A...
3. Let A and B be any nxn matrices. Suppose ū is an eigenvector of A and A+B with corresponding eigenvalues 1 and p. Show that ū is also an eigenvector for B and find an expression for its corresponding eigenvalue. [2]
2. In what follows, A, B denote two square matrices. Prove the follow- ing statements using the appropriate definitions. (a) If v is a common eigenvector to A and B, then v is also an eigen- vector of AB (b) If A is diagonalizable and B is similar to A, then B is also diago- nalizable.
vi) Suppose that A and B are two n × n matrices and that AB-A is invertible. Prove that BA-A is also invertible.
Let A = CD where C, D are n xn matrices, and is invertible. Prove that DC is similar to A. Hint: Use Theorem 6.13, and understand that you can choose P and P-inverse. Prove that if A is diagonalizable with n real eigenvalues 11, 12,..., An, then det(A) = 11. Ay n Prove that if A is an orthogonal matrix, then so are A and A'.
linear algebra question
2. (5' each) Give short answers: (a) True or false: If Ai-Adi for some real number λ, then u is an eigenvector of matrix A. If a square matrix is diagonalizable, then it has n distinct real eigenvalues. Two vectors of the same dimension are linearly independent if and only if one is not a multiple of the other. If the span of a set of vectors is R", then that set is a basis of R...
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...
Let А and B be similar nxn matrices. That is, we can write A = CBC- for some invertible matrix с Then the matrices A and B have the same eigenvalues for the following reason(s). A. Both А and A. Both А and B have the same characteristic polynomial. B. Since A = CBC-1 , this implies A = CC-B = IB = B and the matrices are equal. C. Suppose that 2 is an eigenvalue for the matrix B...
Suppose we have a quantum system with N eigenstates. Then we know the eigenstates can be expressed as vectors, and operators can be represented by N × N matrices (a) Prove that (A)(A)where At is the transpose conjugate of matrix A. Here, A is not required to be Hermitian operator (Hint: express A and) in matrix and vector form. Use matrix calculation to show that (Αψ|U) is the same as 1Atlp.) (b) Prove that (ΑΒψ|U)-(ψ1BtAtlp). Á and B are not...
8: Suppose that A and B are similar matrices, B = p-1AP, where 6 2 P = -1 1 We know that A and B have the same characteristic polynomial and the same eigenvalues. Suppose that 2 is one of the common eigenvalues and x = [4 1] is a corresponding eigenvector of A. Which of the following is the eigenvector of B corresponding to 2 ? "f1-4-0-0-0-0-01-10 #8: Select
We say that A and B are similar matrices if A = SBS-1 for some invertible matrix S. Are the following true or false. Given a mathematical reason (proof). (a) If A and B are similar, then A and B have the same eigenvalues. Answer: (b) If A and B are similar, then A and B have the same eigenvectors. Answer: c) If A and B are similar, then A - 51 and B – 51 are similar. Answer: (d)...
3. Let A and B be any nxn matrices. Suppose ū is an eigenvector of A and A+B with corresponding eigenvalues 1 and p. Show that ū is also an eigenvector for B and find an expression for its corresponding eigenvalue. [2]
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