## anonymous 3 years ago I linear algebra, what's a pivot column?

1. anonymous

In*

2. UnkleRhaukus

pivot columns are the columns that contain the leading 1's in the row

3. anonymous

Ohh thanks!

4. UnkleRhaukus

*When in row echelon form

5. anonymous

Not reduced?

6. UnkleRhaukus

row echelon form is fine, reduced row echelon form works too (but is not required).

7. anonymous

Ohh thanks :) .

8. UnkleRhaukus

can you find the piviot columns of $\begin{pmatrix}1&1&1\\0&1&2\\2&2&5\end{pmatrix}$?

9. anonymous

There are 3 pivot columns.