The fun starts when you study quaternions
i^2 = j^2 = k^2 = ijk = −1
Comment on UwU brat mathematician behavior
PM_ME_VINTAGE_30S@lemmy.sdf.org 3 days ago
Wait bottom mathematican is using j=√-1 instead of i and not the engineer? Because I’m EE gang, and all my homies use j.
wetbeardhairs@lemmy.dbzer0.com 3 days ago
pticrix@lemmy.ca 3 days ago
This can’t be real
HappyFrog@lemmy.blahaj.zone 3 days ago
They’re actually very useful: en.wikipedia.org/wiki/Quaternion
qjkxbmwvz@startrek.website 3 days ago
(…I think you may have gotten whooshed…)
codexarcanum@lemmy.dbzer0.com 3 days ago
It gets worse actually. You can define a number system using any power of 2 amount of i-like units in a similar relationship to quaternions using the Cayley-Dickson construction
Fascinatingly, you lose some property of the algebra at each step. Quaternions aren’t commutative: ABC != CBA. Octonians aren’t associative: (AB)C != A(BC). Once you get into 16 i’s with subscripts, it really gets crazy.
serenissi@lemmy.world 3 days ago
this isn’t real
bisby@lemmy.world 3 days ago
I agree. Clearly i is current. What is this i=√-1 nonsense.
grysbok@lemmy.sdf.org 3 days ago
[Lapsed] mechanical engineering gang checking in. I was also surprised. Though, tbh, I think it came down to personal preference of the professor more than field-wide consensus.
affiliate@lemmy.world 3 days ago
a real mathematician would use
(0, 1)instead ofi
GandalfTheDumb@lemmy.world 3 days ago
That part also got me really confused. All the mathematicans I know use i while engineers use i or j depending on the kind of engineer. I’ve never seen a Pikachu engineer using anything other than j.
Ganbat@lemmy.dbzer0.com 3 days ago
That’s a fucking favorite now. Keeping that in my back pocket.
ryedaft@sh.itjust.works 3 days ago
OPs boyfriend is obviously an i engineer and hates j engineers. No one can stay angry at mathematicians - engineers on the other hand…