TheWrathOfMath
Junior Member
- Joined
- Mar 31, 2022
- Messages
- 162
I was asked to prove that if A is a real matrix, and given that A*A^T=0, A=0.
I proved it for i=j by using the sigma notation.
But how do I prove the case for i=/=j?
I proved it for i=j by using the sigma notation.
But how do I prove the case for i=/=j?