Permutation matrices | Lecture 9 | Matrix Algebra for Engineers

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What is a permutation matrix? Define 2x2 and 3x3 permutation matrices.

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Mr. Jeffrey, I was intrigued by your setup used in your videos, so much so that it was quickly a debatable topic among my fellow physicists, after much theories and deliberations. we come up with the best theory that explains your superhuman ability to write backward. Is it true to claim that when editing the video, you or your editor rotate the image, in order to give the viewer a clear view of what you write on your board with fluorescent markers?

NakzorCaft
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the professor delivers concepts and techniques seamlessly, almost sneakily.

xoppa
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How are you so good at writing backwards

mantasr
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Clear and crisp, this is! Thank you..

dishantvyas
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How are you so good at multiplying matrices backwards

featureofficial
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Hi professor Jeffrey, you said a permutation matrices multiply against another matrices permutes the rows of that matrices, but you also said the identity matrices keeps the same order of the matrices that it multiplies against, hence it's also called a permutation matrices, that's totally opposite of your definition of permutation matrices. This is confusing.

weisanpang
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What are application of pernumation matrices. Those are neat.

michapeka
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The only thing that I could not understand in the lecture is how PA=(PI)A makes things simple?

vijaysinghchauhan
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thank you very much this was very helpful

yinyang
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How do you solve: aP = b, where a and b are row vectors and are known. We aim to find P. Thank you.

xhj