fossilesque@lemmy.dbzer0.comM to Science Memes@mander.xyzEnglish · 3 days agoidentity theftlemmy.dbzer0.comexternal-linkmessage-square20fedilinkarrow-up1591arrow-down111
arrow-up1580arrow-down1external-linkidentity theftlemmy.dbzer0.comfossilesque@lemmy.dbzer0.comM to Science Memes@mander.xyzEnglish · 3 days agomessage-square20fedilink
minus-squarefallingcats@discuss.tchncs.delinkfedilinkEnglisharrow-up5·2 days agoWouldn’t you need to put anyMatrix first, since matrix multiplication isn’t commutative?
minus-squarefallingcats@discuss.tchncs.delinkfedilinkEnglisharrow-up1·edit-22 days agoNo I just tried it and I was wrong, it seems like it doesn’t matter for the ID matrix specifically
minus-squarepseudo@jlai.lulinkfedilinkEnglisharrow-up1·2 days 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-squareMBMlinkfedilinkEnglisharrow-up1·2 days 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