📐
ActiveBook
Linear Algebra Live
Linear Algebra Live
Matrices that move. Eigenvectors you can drag.
By ActiveBook Admin
$12.99
one-time
About this ActiveBook
Every chapter is a workbench. Type a matrix, see the transformation. Drag eigenvectors. Project onto subspaces. Build intuition first, formulas later — they\'re there when you scroll down.
What's inside
7 interactive tools
📈
🎯
🧭
💻
❓
🃏
🤖
Function grapher
Plot any function in 2D — pan, zoom, trace.
3D plotter
Surfaces, vector fields, parametric curves in 3D.
Vector field viewer
Visualize fields and flows on a moving grid.
Code sandbox
Edit & run code in-page — no setup.
Quizzes
Per-chapter checks with feedback.
Spaced flashcards
Built-in SRS that travels with you.
AI tutor
Ask questions in context, get answers grounded in the book.
Why ActiveBooks
- ✓ Everything runs right in your browser — no setup, no install
- ✓ Lifetime updates as the author adds new chapters and tools
- ✓ Your state stays — bookmarks, parameters, notes