Echelon Matrix/Examples/Arbitrary Example 4

Example of Echelon Matrix

$\begin {bmatrix}

1 & 0 & 2 & 0 \\ 0 & 0 & 0 & 0 \\ 0 & 1 & 0 & 2 \\ \end {bmatrix} $ is not an echelon matrix, because row $2$ is a zero row, coming before row $3$.

Sources

• 1982: A.O. Morris: Linear Algebra: An Introduction (2nd ed.) ... (previous) ... (next): Chapter $1$: Linear Equations and Matrices: $1.2$ Elementary Row Operations on Matrices: Example