key-book

Why we included this project

This companion text exists because the Chinese textbook it follows is dense: the proofs are terse and assume a solid math background. The notes fill in what the book skips, defining concepts the text names without explaining, laying out the reasoning behind each proof, and adding worked examples. Chapters track the book's seven core topics, from PAC learnability and VC dimension through generalization bounds, stability, consistency, convergence rates, and regret bounds, so readers can work through both side by side. The prose stays plain on purpose, which suits students in a formal course as well as engineers who want theory behind their practice. Everything is readable online and downloadable as a PDF, so it is easy to consume chapter by chapter next to the source.