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Exercise 20 Let fr,y} be an orthonormal basis of a two-dimensional subspace S of R" and...
Exercise 25. Let , be an orthonormal basis of a two-dimensional subspace S of R" and...
Exercise 25. Let , be an orthonormal basis of a two-dimensional subspace S of R" and A xyT + (i) Show that x+y and x -y are eigenvectors of A. What are their corresponding eigenvalues? (ii) Show that 0 is an eigenvalue of R" with n - 2 linearly independent eigenvectors. (iii) Explain why A is diagonalizable.
Exercise 25. Let , be an orthonormal basis of a two-dimensional subspace S of R" and A xyT + (i) Show that x+y...
Exercise 6 (6.4.35, p.452) Let A e Cnxn, and let S be a k-dimensional subspace of...
Exercise 6 (6.4.35, p.452) Let A e Cnxn, and let S be a k-dimensional subspace of C". Then a vector ve S is called a Ritz vector of A from S if and only if there is a pie C such that the Rayleigh-Ritz-Galerkin condition Av – uv Is holds, that is, (Av – uv, s) = 0 for all s E S. The scalar u is called the Ritz value of A associated with v. Let 91, ...,qk be...
Let w be a subspace of R" and B = {ū1, ... ,üx] be an orthonormal...
Let w be a subspace of R" and B = {ū1, ... ,üx] be an orthonormal basis for W If we form the matrix U = (ū ū2 - ūk) then the matrix P=UUT is a projection matrix so that Po = Proj, Use the fact that P =P to find all eigenvalues of the matrix P. Hint: Suppose that PŪ = nü for some scalar ܝܠ and non-zero vector Use the fact that p2 = P to find all...
5. Exercise A5: Given {ui,..., up an orthogonal basis for a subspace W of R". Let...
5. Exercise A5: Given {ui,..., up an orthogonal basis for a subspace W of R". Let T: RnR be defined by T(x)prox, the projection of x onto the subspace W (a) Verify that T is a linear transformation. (b) What is ker(T), the kernel of T? c) What is T (R"), the range of T?
(i) Find an orthonormal basis {~u1, ~u2} for S (ii) Consider the function f : R3...
(i) Find an orthonormal basis {~u1, ~u2} for S
(ii) Consider the function f : R3 -> R3 that to each vector ~v
assigns the vector of S given by
f(~v) = <~u1, ~v>~u1 + <~u2; ~v>~u2. Show that it is a
linear function.
(iii) What is the matrix of f in the standard basis of R3?
(iv) What are the null space and the column space of the matrix
that you computed in the
previous point?
Exercise 1. In...
Exercise 12.6.3 Let V and W be finite dimensional vector spaces over F, let U be a subspace of V and let α : V-+ W be a surjective linear map, which of the following statements are true and which...
Exercise 12.6.3 Let V and W be finite dimensional vector spaces over F, let U be a subspace of V and let α : V-+ W be a surjective linear map, which of the following statements are true and which may be false? Give proofs or counterexamples O W such that β(v)-α(v) if v E U, and β(v) (i) There exists a linear map β : V- otherwise (ii) There exists a linear map γ : W-> V such that...
Problem 7: Let S be the subspace of R' defined by the equation: x,+2x2-13 = a)...
Problem 7: Let S be the subspace of R' defined by the equation: x,+2x2-13 = a) Find an orthonormal basis for S and an orthonormal basis for S b) Find the vectors liE S and vES® such that the vector x = (2,1,-8/ can be written in the form x = 11 +-
Exercise 5 Let z and y be linearly independent vectors in R" and let S- span(,y). We can use r and y to define a matrix A by setting (a) Show that A is symmetric (b) Show that N(A) S (c) Show tha...
Exercise 5 Let z and y be linearly independent vectors in R" and let S- span(,y). We can use r and y to define a matrix A by setting (a) Show that A is symmetric (b) Show that N(A) S (c) Show that the rank of A must be 2.
Exercise 5 Let z and y be linearly independent vectors in R" and let S- span(,y). We can use r and y to define a matrix A by setting (a)...
please help me with questions 1，2，3 1. Let V be a 2-dimensional vector space with basis...
please help me with questions 1，2，3
1. Let V be a 2-dimensional vector space with basis X = {v1, v2}, write down the matrices [0]xx and [id]xx. 2. Let U, V, W be vector spaces and S:U +V, T:V + W be linear transforma- tions. Define the composition TOS:U + W by To S(u) = T(S(u)) for all u in U. a. Show that ToS is a linear transformation. b. Now suppose U is 1-dimensional with basis X {41}, V...
Hi, could you post solutions to the following questions. Thanks. 2. (a) Let V be a vector space on R. Give the definition of a subspace W of V 2% (b) For each of the following subsets of IR3 sta...
Hi,
could you post solutions to the following questions. Thanks.
2. (a) Let V be a vector space on R. Give the definition of a subspace W of V 2% (b) For each of the following subsets of IR3 state whether they are subepaces of R3 or not by clearly explaining your answer. 2% 2% (c) Consider the map F : R2 → R3 defined by for any z = (zi,Z2) E R2. 3% 3% 3% 3% i. Show that...
Exercise 25. Let , be an orthonormal basis of a two-dimensional subspace S of R" and A xyT + (i) Show that x+y and x -y are eigenvectors of A. What are their corresponding eigenvalues? (ii) Show that 0 is an eigenvalue of R" with n - 2 linearly independent eigenvectors. (iii) Explain why A is diagonalizable.
Exercise 25. Let , be an orthonormal basis of a two-dimensional subspace S of R" and A xyT + (i) Show that x+y...
Exercise 6 (6.4.35, p.452) Let A e Cnxn, and let S be a k-dimensional subspace of C". Then a vector ve S is called a Ritz vector of A from S if and only if there is a pie C such that the Rayleigh-Ritz-Galerkin condition Av – uv Is holds, that is, (Av – uv, s) = 0 for all s E S. The scalar u is called the Ritz value of A associated with v. Let 91, ...,qk be...
Let w be a subspace of R" and B = {ū1, ... ,üx] be an orthonormal basis for W If we form the matrix U = (ū ū2 - ūk) then the matrix P=UUT is a projection matrix so that Po = Proj, Use the fact that P =P to find all eigenvalues of the matrix P. Hint: Suppose that PŪ = nü for some scalar ܝܠ and non-zero vector Use the fact that p2 = P to find all...
5. Exercise A5: Given {ui,..., up an orthogonal basis for a subspace W of R". Let T: RnR be defined by T(x)prox, the projection of x onto the subspace W (a) Verify that T is a linear transformation. (b) What is ker(T), the kernel of T? c) What is T (R"), the range of T?
(i) Find an orthonormal basis {~u1, ~u2} for S
(ii) Consider the function f : R3 -> R3 that to each vector ~v
assigns the vector of S given by
f(~v) = <~u1, ~v>~u1 + <~u2; ~v>~u2. Show that it is a
linear function.
(iii) What is the matrix of f in the standard basis of R3?
(iv) What are the null space and the column space of the matrix
that you computed in the
previous point?
Exercise 1. In...
Exercise 12.6.3 Let V and W be finite dimensional vector spaces over F, let U be a subspace of V and let α : V-+ W be a surjective linear map, which of the following statements are true and which may be false? Give proofs or counterexamples O W such that β(v)-α(v) if v E U, and β(v) (i) There exists a linear map β : V- otherwise (ii) There exists a linear map γ : W-> V such that...
Problem 7: Let S be the subspace of R' defined by the equation: x,+2x2-13 = a) Find an orthonormal basis for S and an orthonormal basis for S b) Find the vectors liE S and vES® such that the vector x = (2,1,-8/ can be written in the form x = 11 +-
Exercise 5 Let z and y be linearly independent vectors in R" and let S- span(,y). We can use r and y to define a matrix A by setting (a) Show that A is symmetric (b) Show that N(A) S (c) Show that the rank of A must be 2.
Exercise 5 Let z and y be linearly independent vectors in R" and let S- span(,y). We can use r and y to define a matrix A by setting (a)...
please help me with questions 1，2，3
1. Let V be a 2-dimensional vector space with basis X = {v1, v2}, write down the matrices [0]xx and [id]xx. 2. Let U, V, W be vector spaces and S:U +V, T:V + W be linear transforma- tions. Define the composition TOS:U + W by To S(u) = T(S(u)) for all u in U. a. Show that ToS is a linear transformation. b. Now suppose U is 1-dimensional with basis X {41}, V...
Hi,
could you post solutions to the following questions. Thanks.
2. (a) Let V be a vector space on R. Give the definition of a subspace W of V 2% (b) For each of the following subsets of IR3 state whether they are subepaces of R3 or not by clearly explaining your answer. 2% 2% (c) Consider the map F : R2 → R3 defined by for any z = (zi,Z2) E R2. 3% 3% 3% 3% i. Show that...
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