this post was submitted on 15 Mar 2025
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Science Memes

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identity theft (lemmy.dbzer0.com)
submitted 3 days ago by [email protected] to c/[email protected]
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[–] [email protected] 5 points 2 days ago (2 children)

Wouldn't you need to put anyMatrix first, since matrix multiplication isn't commutative?

[–] [email protected] 1 points 2 days ago

Huh? Identity times anyMatrix is also anyMatrix. The matrix just has to have the right dimensions

[–] [email protected] 3 points 2 days ago (1 children)

You are right. I will correct it.

[–] [email protected] 1 points 2 days ago* (last edited 1 day ago) (1 children)

No I just tried it and I was wrong, it seems like it doesn't matter for the ID matrix specifically

[–] [email protected] 1 points 1 day ago

I need to freshen up on my linear algebra. I don't remember on which sense it goes but I think if you swap the factors, you'll have to you transpose the matrix x to keep the same result.