Numerical Algorithms And Optimization

=Book Resources=

Though Steven boyd is considered the best book, I would recommend Justin Solomon's Book

Numerical Algorithms: Methods for Computer Vision, Machine Learning, and Graphics

The book is more practical and author's style is very lucid

=Video Tutorials=

Justin Solomon Numerical Analysis
 * 1) By Justin Solomon

A very simple practical explanation (though no deepness)
 * 1) By NumericalMethodsGuy

Numerical Methods Channel