Problem 2. Let A be an m × n matrix, U be an m × m unitary matrix, and V be an n × n unitary matrix. Prove the following 1. ||A|| = ||U A|| = || AV ||

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Advanced Linear Algebra:

Problem 2. Let A be an m × n matrix, U be an m × m unitary matrix, and V be an n x n
unitary matrix. Prove the following
1. ||A|| = ||U A|| = || AV||
2. rank(A) = rank(U A) = rank(AV).
Transcribed Image Text:Problem 2. Let A be an m × n matrix, U be an m × m unitary matrix, and V be an n x n unitary matrix. Prove the following 1. ||A|| = ||U A|| = || AV|| 2. rank(A) = rank(U A) = rank(AV).
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