[profgrizzle]

Chapter 13 of the textbook was added in January 2022. It covers separating hyperplanes, signed distance to a hyperplane, Max-margin Classifiers, a remark on Soft Margin Classifiers, and the Orthogonal Projection Operator. The additional material was added to support EECS 445, Machine Learning at Michigan.

[tptacek]

This is (one of?) the authors of the course, for what it's worth. Welcome to HN! Pelt him with questions, everybody. :)