Fukin brainlets making brainlet mistakes

bruh that's right. when you take the inverse you reverse the order.

>hoffman and kunze just a meme
Lrn2meme fgt pls

Thanks for posting these photos. I don't recognize these at all from the second edition pdf. I'll need to see a pdf of the first edition to determine which I like better. I wonder if the pdf online is just a draft of the second edition, maybe if I order the book it won't have those errors?

his photo is from the 1st edition, the screenshots are from the 2nd edition. I've never seen so much change between editions.

Do you think you can photo the first chapter? it's only like 20 pages, it would be really interesting to compare.

you replied to the wrong images friend, but for the proof of the elementary matrices I actually think the 2nd edition has a neat proof because they defined a few pages earlier the kronecker delta function [math] \delta_{ij} = I_{ij}[/math] which allows for a more direct construction of elementary matrices based on row operations on the identity which is what the first edition shows at the end by letting B=I.

No, he's not talking about the columns themselves (the Bi's) but all together in B. See the very last line. B is a row vector made up of column vectors.

To be fair he was claiming that he can understand the proof in his head without writing it down, not that he came up with the proof
He's probably only taken calc

oh I see how that could be interpreted, interesting but the grammar is ambiguous

but that would mean he should have said the 1xp matrices

Get a real linear algebra text OP