A Programmer’s Intuition for Matrix Multiplication – BetterExplained

https://betterexplained.com/articles/matrix-multiplication/
A Programmer’s Intuition for Matrix Multiplication – BetterExplained

Complexity: 7 Rating: 8

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Excellently written. Site contains also other similar articles, for example:

A Visual, Intuitive Guide to Imaginary Numbers
Intuitive Arithmetic With Complex Numbers
Understanding Why Complex Multiplication Works
Intuitive Guide to Angles, Degrees and Radians
Intuitive Understanding Of Euler's Formula
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A Programmer's Intuition for Matrix Multiplication