Matrix Lab
Drag matrices around in space until linear algebra clicks
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“矩阵实验室 · 在空间里理解矩阵”its own headline
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About
Matrix Lab is a 56-level interactive course. You drag vectors, matrices, and grids on 2D and 3D canvases and watch determinants, eigenvectors, and basis changes happen under your cursor. First 7 levels free.