- #1
fonseh
- 529
- 2
Homework Statement
In my book , the author stated that when we do the pivoting , we need to make the element below the leading element = 0 . For example for 3x3 matrix , for the first column , we have to make a11 = max , and make sure that a21 and a31 less than a11 , for the second column , we have to make the a22 = max , make sure that the a32 less than a22 ...
But , according to my lecturer ( in second photo)( I have reduced it into row echelon formed in first matrix , for the 2nd matrix , my lecturer just swap the row) , he make the a11 max compared to the other element( a12 and a13) in the first row ...
For row 2 , he make the a22 max compared to a21 and a23 in the same row
For row 2 , he make the a33 max compared to other element (a31 and a32) ...
Homework Equations
The Attempt at a Solution
I don't think the lecturer is correct . Can someone explain about it ? I have read a lot of online resource , i can't find them similar to the way that the lecturer read [/B]