if A is a matrix NxN prove that if A x A^t = matrix nule NxN so A is nule NxN
I'Have tried by the summation notation but nothing came
2026-03-25 14:26:46.1774448806
Prove if a matrix A multiplied by its transpose is 0, then the matrix A is nule
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Hint: What appears along the diagonal of $A A^T$?