If you can't see the slideshow(above), just download the file.
Lecture04 - Gaussian Elimination, LU Decomposition and Gauss-Seidel Method - [Download]

If you can't see the slideshow(above), just download the file.
Lecture03 - Linear Algebraic Equations - [Download]

Aside from the class lecture slides provided here, lectures notes (in PDF format) are also made available here.

1. Approximation and Errors [download]

2. Systems of Linear Equations [download]

3. Root Finding [download]

*These are accompanying notes for the Numerical Methods for Engineers, 4/e, Chapra, et. al. by Ronald D. Ziemian, et. al.

(the 4th and 5th editions of the NME book have only slight differences)