###### Definition 3.5.9

The \(rank\) of a matrix \(A\text{,}\) denoted \(\rank(A)\text{,}\) is the number of pivot positions of \(A\text{.}\)

The \(rank\) of a matrix \(A\text{,}\) denoted \(\rank(A)\text{,}\) is the number of pivot positions of \(A\text{.}\)