1. The problem statement, all variables and given/known data "Prove a specific rref matrix is unique" 2. Relevant equations 3. The attempt at a solution This is all I have on my review sheet for my next exam. I have the proof of the uniqueness of rref but how do you prove a specific rref matrix is unique ? say that's any nonsingular matrix in R^3 Would appreciate any hints. Thanks, Roni.