fossilesque@lemmy.dbzer0.comM to Science Memes@mander.xyzEnglish · 2 days agoidentity theftlemmy.dbzer0.comimagemessage-square20fedilinkarrow-up1568arrow-down110
arrow-up1558arrow-down1imageidentity theftlemmy.dbzer0.comfossilesque@lemmy.dbzer0.comM to Science Memes@mander.xyzEnglish · 2 days agomessage-square20fedilink
minus-squarefallingcats@discuss.tchncs.delinkfedilinkEnglisharrow-up4·19 hours agoWouldn’t you need to put anyMatrix first, since matrix multiplication isn’t commutative?
minus-squarefallingcats@discuss.tchncs.delinkfedilinkEnglisharrow-up1·edit-211 hours agoNo I just tried it and I was wrong, it seems like it doesn’t matter for the ID matrix specifically
minus-squarepseudolinkfedilinkEnglisharrow-up1·14 hours 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-squareMBM@lemmings.worldlinkfedilinkEnglisharrow-up1·18 hours 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