''echelon'' ▫ᴱᴺ｜appendage｜___｜20260628182639-01-•

Examples
An example of a 4×6 matrix in row echelon form (the $\ast$ indicate the nonzero pivots, and the $\cdot$ indicate entries which may be zero or nonzero): $\left[\begin{array}{cccccc}\ast & \cdot & \cdot & \cdot & \cdot & \cdot \\ 0& \ast & \cdot & \cdot & \cdot & \cdot \\ 0& 0& 0& 0& \ast & \cdot \\ 0& 0& 0& 0& 0& 0\end{array}\right]$

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