As in the title. I know that over field $\mathbb{R}$ for 2 matrices to be congruent they need the same rank and signature. However, I don't know how to proceed over field $\mathbb{Z}_{13}$.
2026-03-18 00:43:31.1773794611
Are all matrices A and B ($3x3$), such that $B = A * 10$ congruent over field $\mathbb{Z}_{13}$?
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