- Font TeX:
- \left( {\begin{array}{*{20}{c}}5 & 1 & 1 & {\left|
{\,\,\,\,1} \right.}\\3 & 2 & 1 & {\left| { - 2}\right.}\\2
& 1 & 0 & {\left| {\,\,\,\,1} \right.}\\\end{array}}
\right)\, \to \left( {\begin{array}{*{20}{c}}1 &
1 & 5 & {\left| {\,\,\,\,1} \right.}\\1 & 2 & 3 &
{\left| { - 2}\right.}\\0 & 1 & 2 & {\left| {\,\,\,\,1}
\right.}\\\end{array}} \right)\, \to \left( {\begin{array}{*{20}{c}}1
& 1 & 5 & {\left| {\,\,\,\,1}
\right.}\\0 & 1 & { - 2} & {\left| { - 3} \right.}\\0
& 1 & 2 & {\left| {\,\,\,\,1} \right.}\\\end{array}}
\right)\, \to \left( {\begin{array}{*{20}{c}}1 & 1 & 5 &
{\left| {\,\,\,\,1} \right.}\\0 & 1 & { -
2} & {\left| { - 3} \right.}\\0 & 0 & 4 & {\left|
{\,\,\,\,4} \right.}\\\end{array}} \right)