2. Let S be any ring and let n > 2 be an integer. Prove that if A is any strictly upper triangular matrix in Mn(S) then
Posted: Tue Sep 07, 2021 7:35 am
2. Let S be any ring and let n > 2 be an integer. Prove that if A is any strictly upper triangular matrix in Mn(S) then A” = 0. (Recall, a strictly upper triangular matrix is one whose entries on and below the main diagonal are all zero.)