1. ## Submatrix of A

If A =1 3 -1 2
2 1 0 1
3 2 3 2
4 1 4 1

write down the (3,3)-submatrix of A.

How do i start this? Can't figure it out.

2. What is your definition of submatrix?

3. Honestly, I have no clue. If you could walk me step by step, i'd get it. (obvious)

4. Originally Posted by Esthephane
Honestly, I have no clue. If you could walk me step by step, i'd get it. (obvious)

Look here .

5. So mu submatrix of (3,3) would be:

132
211
411
?

6. Right.

7. Thanks! Now one last question, how would i be able to compute the (1,3) minor of A?

8. $\begin{vmatrix}{3}&{-1}&{2}\\{1}&{\;\;0}&{1}\\{1}&{\;\;4}&{1}\end{vmatr ix}=\ldots$

9. Silly me. thanks man!

10. Originally Posted by Esthephane
Silly me.

I don't agree.

man!

I agree.