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#1 2007-11-09 08:49:47

EPhillips1989
Member
Registered: 2007-11-03
Posts: 29

rank of a matrix

hey can anyone tell me what a rank of a matrix is for example i have the following matrix

1  0  3  1  2
1  4  2  1  5
3  4  8  1  2

which iv put in row echelon form

1  4  2  1  5
0 -4  1  0 -3
0  0  0 -2 -7

does anyone know how to find the rank??

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#2 2007-11-10 01:00:32

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: rank of a matrix

The rank of a matrix is simply the number of non-zero rows it has in row echelon form. So in your case, it would be 3.


Why did the vector cross the road?
It wanted to be normal.

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