Any e.r.o. can also be written as an

elementary matrix. The elementary matrix for an e.r.o. R

_{1} is found by applying R

_{1} to I (the

identity matrix) .

If

**A** ->

**B** under an e.r.o. R

_{1}, then

**A**.

**r** =

**B**,

where

** r ** is the elementary matrix corresponding to R

_{1}.