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The following definitions are used in Exercises 28 32. Definitions. Let V be a vector

Chapter 2, Problem 28

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QUESTION:

The following definitions are used in Exercises 28 32. Definitions. Let V be a vector space, and let T: V V be linear. A subspace W of V is said to be T-invariant ifT(x) W for every x W, that is, T(W) C W. 7f W is T-iuvariaut, we define the restriction of T on W to be the function T w : W W defined by T w (x) = T(x) for all x W. Exercises 28-32 assume that W is a subspace of a vector space V and that T: V > V is linear. Warning: Do not assume that W is T-invariant or that T is a projection unless explicitly stated.

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QUESTION:

The following definitions are used in Exercises 28 32. Definitions. Let V be a vector space, and let T: V V be linear. A subspace W of V is said to be T-invariant ifT(x) W for every x W, that is, T(W) C W. 7f W is T-iuvariaut, we define the restriction of T on W to be the function T w : W W defined by T w (x) = T(x) for all x W. Exercises 28-32 assume that W is a subspace of a vector space V and that T: V > V is linear. Warning: Do not assume that W is T-invariant or that T is a projection unless explicitly stated.

ANSWER:

Step 1 of 5

To prove that  is T-invariant.

We know that for a vector space V and a linear transformation , a subspace W of V is said to be T-invariant if .

Let us assume .

Then, W is a subspace of V.

Suppose

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