- #1
roam
- 1,271
- 12
Homework Statement
This is a worked example:
[PLAIN]http://img24.imageshack.us/img24/7783/44818829.gif
The Attempt at a Solution
So, in the answer I don't understand how they obtained
[tex]L= \begin{pmatrix}1 & 0 & 0 \\ 3 & 1 & 0 \\ 1 & -1 & 1 \end{pmatrix}[/tex]
I don't think this "L" here is the lower triangular matrix used in the LU factorization of A. Because I followed the LU decomposition algorithm and ended up with
[tex]L= \begin{pmatrix}1 & 0 & 0 \\ 3 & 8 & 0 \\ 1 & 4 & 5 \end{pmatrix}[/tex]
So where did they get that matrix from? Any explanation is very much appreciated.
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