LU Decomposition, LDU Factorisation, Triangular Matrices - Linear Algebra

This video explains the LU decomposition and LDU factorization methods, including a solved example (3x3) that is like the steps of a computer algorithm, what does it do, and how to solve a linear system using it. You will understand why it is better than full inversion.

0:00 LU solution method
1:32 LU decomposition
11:06 Simplified LU decomposition
15:30 LDU factorisation