Question: Exercise 2.11.7 For V positive definite andC(VX) C(X) use PropositionB.12 and the results in Section B.4 to show that r (VX) = r (VXX

Exercise 2.11.7 For V positive definite andC(VX) ⊂ C(X) use PropositionB.12 and the results in Section B.4 to show that r (VX) = r (VXX

) = r (XX

) = r (X).

Hint: Show N (VXX

) = N (XX

).

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