Problem 6: Let T: V → V be a linear map and let W be a T-invariant subspace. Prove or give a counterexample to the following statements: a.) If W is a proper subspace of V, i.e., WV, then any subspace of W is T-invariant. b.) If U is a subspace of V such that U W = V, then U is T-invariant. c.) Each eigenvalue λ of Tw is an eigenvalue of T; moreover, the eigenspace E(X, Tw) is contained in E(X, T). (Here Tw denotes the restriction Tw: W → W of T.)
Problem 6: Let T: V → V be a linear map and let W be a T-invariant subspace. Prove or give a counterexample to the following statements: a.) If W is a proper subspace of V, i.e., WV, then any subspace of W is T-invariant. b.) If U is a subspace of V such that U W = V, then U is T-invariant. c.) Each eigenvalue λ of Tw is an eigenvalue of T; moreover, the eigenspace E(X, Tw) is contained in E(X, T). (Here Tw denotes the restriction Tw: W → W of T.)
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.4: Linear Transformations
Problem 24EQ
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