LU Descomposition

LU descomposition

To understand LU descomposition you have to check this out:

To use LU elimination:

1- Find "L" and "U": Lower and Upper matrices.

2- You know" L" and "b", so you can get "y"

3- With "U" and "y" find "X"!

Lets see same excercise we've worked before:

A 

Step 1

To find L and U matrices:

L
U
 Step 2:
With L and b find y

Step 3:

With U and y find X

      Now you have the answer!