Free material for hard books, in order.
Lectures, sample chapters and problem sets, published free by the people who wrote them. Sequenced section by section.
Highlights of Linear AlgebraPart I
Filled square, read. Red rule, where you left off.
The material is already free. It is almost never in the book's order.
A serious textbook often has a great deal published around it. The author posts sample chapters. The university puts the entire course online as video. The problem sets and the solutions go up too.
Then it sits there, unusable. Lectures are numbered by the course, not the book. Three sections have a free chapter and the other forty-three do not. The problem sets arrive as one combined file. Working out what to read after section I.7 means searching three sites, every time.
These roadmaps put that material back into the book's own sequence and keep your place in it.
Linear Algebra and Learning from Data
Gilbert Strang's graduate text connects the linear algebra you half-remember to the mathematics running underneath modern machine learning: the SVD, low-rank approximation, optimization, and the structure of neural networks. This roadmap walks all 46 sections in order and points each one at the material MIT publishes for free.
Highlights of Linear Algebra11
Computations with Large Matrices4
Low Rank and Compressed Sensing5
Special Matrices10
Probability and Statistics6
Optimization5
Learning from Data5
What a roadmap carries
01
The contents, in sequence
Every section of the book in the order the author wrote it, each one linked to the lecture that covers it, the problem set, and the chapter itself where a free one exists.
02
Your place, and how far in
Tick sections off as you read. The next one is marked, so returning after two weeks away takes one glance rather than five minutes of hunting.
03
Guides, where they help
For some sections we write our own: what the section is really about, what it sets up later in the book, and where people reliably get stuck.
What we host, and what we do not.
We host no copyrighted books, chapters or PDFs. None are in the repository and none are served from this domain. Every reading link points at the server of the author or the university that chose to publish that material freely.
There is no account, no advertising, no tracking, and nothing for sale. Your progress is kept in your own browser and is never sent anywhere, because there is nowhere to send it. The site is static files on a free tier, which is why it can stay this way.
Where a book is sold, we link to buy it. Following a roadmap is a supplement to owning the book, not a replacement for it. The full position is on the copyright page.