Comments by "Christian Baune" (@programaths) on "Matrix multiplication as composition | Chapter 4, Essence of linear algebra" video.

  1. You can also see that as a sequence. For example: square, increment, double You can imagine it's a factory line and you could "square and increment" then "double": 3->10->20 You can also "square" then "increment and double" 3->9->20 It's just that you did put one different part of the production line in a big box, but ultimately, you are still doing the same processing in the same order. So, it's associative!
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