Matrix Multiplication

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Motivation for the definition of matrix multiplication. Alternative ways of thinking about matrix multiplication.
  1. Sheldon Axler
  2. linear algebra
  3. Linear Algebra Done Right
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Yessss, this is it! This is what made me decide to revisit linear algebra, and also what made me decide to use this specific book. A real explanation for why matrix multiplication is defined the way it is!

glauconariston
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Wonderful. I've never known the reason why matrix multiplication is defined as it is until now -- and now, it seems obvious. It comes from the abstraction of linear maps!!

austingubbels
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Thanks for the video! It helped a lot with my exams as a physics BsC student.

gubazoltan
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I think the second image at the screen at time 10:48 is wrong in the meaning that you wrote 'k' instead of 'j' in the part when you restrict the index between 1 and 'p'. But still it works thank you again for uploading!

gubazoltan
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can somebody help me understand how to get from the third line to the fourth line @3:35

seanyboyblu