Linear Algebra
in 3 Days
Linear algebra is an abstract subject that is by no means easy to learn, yet the core technologies of large models, from the underlying layers to the application layer, depend deeply on linear algebra.
Normally, it is very difficult to learn linear algebra in 3 days. But I have discovered a "fulcrum," and by exerting force from this "fulcrum," one can easily lever up the entire subject of linear algebra. Therefore, the goal of learning linear algebra in 3 days is not a gimmick; it can be easily achieved.
Archimedes once said, "Give me a fulcrum, and I shall move the earth." In the book Learn Linear Algebra in Three Days, I use "vectors" as the fulcrum to lever up the entire subject of linear algebra.
Learn Linear Algebra in Three Days is dedicated to students who are anxious and frantic as exams approach, and also to programmers who are switching to AI and cramming to shore up their mathematical foundations.
A fulcrum moves the Earth; a vector moves linear algebra.
People think y = W @ x means x and y are the "same kind of thing."
Wrong. A vector has direction and length. Changing its direction changes its species — it's like turning a
cat into a dog.
That is the true intuition behind every matrix transformation.
Read a free chapter
Get Day 1 — “Vectors & Spaces” and see how the book teaches intuition without proofs.
Early readers
“No proofs. Just code and intuition. Exactly what I needed to stop feeling lost in papers.”
“The SVD day alone was worth the price. I had read about it three times before, but this made it click.”
“Three days, and I finally understand what a matrix does. I wish I had this before my first deep learning course.”
Linear Algebra in 3 Days
From zero to intuition — the matrix math you need for AI
- 📘 12 chapters, ~90 pages PDF
- 💻 40+ PyTorch code examples
- 📐 Visual intuition, no proofs
- 🔄 Free lifetime updates
- 📄 Bonus: one-page linear algebra cheat sheet
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