@fossilesque@lemmy.dbzer0.comM to Science Memes@mander.xyzEnglish • 1 year agoidentity theftlemmy.dbzer0.comimagemessage-square20fedilinkarrow-up1567arrow-down110
arrow-up1557arrow-down1imageidentity theftlemmy.dbzer0.com@fossilesque@lemmy.dbzer0.comM to Science Memes@mander.xyzEnglish • 1 year agomessage-square20fedilink
minus-square@fallingcats@discuss.tchncs.delinkfedilinkEnglish5•1 year agoWouldn’t you need to put anyMatrix first, since matrix multiplication isn’t commutative?
minus-square@fallingcats@discuss.tchncs.delinkfedilinkEnglish2•edit-21 year agoNo I just tried it and I was wrong, it seems like it doesn’t matter for the ID matrix specifically
minus-square@pseudo@jlai.lulinkfedilinkEnglish1•1 year agoI 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.
minus-square@MBM@lemmings.worldlinkfedilinkEnglish1•1 year agoHuh? Identity times anyMatrix is also anyMatrix. The matrix just has to have the right dimensions
Wouldn’t you need to put
anyMatrixfirst, since matrix multiplication isn’t commutative?You are right. I will correct it.
No I just tried it and I was wrong, it seems like it doesn’t matter for the ID matrix specifically
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.
Huh? Identity times anyMatrix is also anyMatrix. The matrix just has to have the right dimensions