Question: If A is an invertible matrix, explain why A and AT must have same null space. Is this true if A is a noninvertible square

If A is an invertible matrix, explain why A and AT must have same null space. Is this true if A is a noninvertible square matrix? Explain

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If A is invertible then so is A T but by Theorem 327 in Section 35 invertible matrices ... View full answer

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