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.
this post was submitted on 14 Jul 2025
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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.
Pikachu engineer
That's a fucking favorite now. Keeping that in my back pocket.
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I agree. Clearly i is current. What is this i=√-1 nonsense.
The fun starts when you study quaternions
i^2 = j^2 = k^2 = ijk = −1
This can't be real
They're actually very useful: https://en.wikipedia.org/wiki/Quaternion
(...I think you may have gotten whooshed...)
Hehe, maybe a little, but wanted to share just in case someone didn't know :3
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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.
(Also, I just got the joke. Damnit @HappyFrog@lemmy.blahaj.zone your serious answer threw me off!)
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this isn't real
[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.
a real mathematician would use (0, 1) instead of i
NGL, this is hot.
I’m a mechanical engineering student with a math minor and I’m a switch so yeah, I’d take either side of this
Fake and gay.
No way the engineer corrects the mathematician for using j instead of i.
How do we know it's gay though? OP could be a girl (male)
Because it's 4chan. And there are no women on the Internet on 4chan
Sure OP is a girl. Guy In Real Life
Newfag.
(sorry! seemed like the appropriate 4chan reply)
My thoughts exactly lol
As an engineer I fully agree. Engineers¹ aren't even able to do basic arithmetics. I even cannot count to 10.
¹ Except maybe Electrical engineers. They seem to be quite smart.
Electrical engineers are the ones that use j though (because i is used for current)
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Engineer here, I can definitely count to 10 tho
0 1 10
The inner machinations of an electrical engineer is too complicated for me to understand, I think they might be thinking on a higher order to understand these circuits
Thats why I barely passed my electrical engineering class lol
Except maybe Electrical engineers.
Yup, I can count just fine to the 10th number in a zero-indexed counting system: black, brown, red, orange, yellow, green, blue, violet, gray, white.
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10? That’s the name some put to 1e1, right?
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The mathematician also used "operative" instead of, uh, something else, and "associative" instead of "commutative"
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Relationship goals
Hum... I don't think the integral "operator" applies by multiplication.
You can put the dx at the beginning of the integral, but not before it.
Physicists be like: whitness me
Nobody on your link is treating the integral "operator" as multiplicative.
dx \int f(x) is blatantly different from \int f(x) dx
If you were using nonstandard analysis with dx an infinitesimal you could put it outside I guess. Maybe with differential forms too?
Switch it with a summation operator and see if it makes sense. The problem isn't the operation by itself, but the fact that the operator implies an argument application, like a function.
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Physicist behavior
Why are we still visiting literal pro-Nazi websites?
Didn't realize you had to be a nazi in order to post on 4chan.
If you are unaware of 4chan being a tool to push people towards fascism, you seriously need to do some more reading and learning. It is an explicit goal of the platform. Here is a random example of an article you can read. Wikipedia is also full of good information.
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4chan is a largely fascist website but that doesn't mean every single screenshot is fascist or does something to promote it
It normalizes their behavior instead of shunning it. Remember: If there’s one Nazi at the bar who hasn’t been kicked out, you’re at a Nazi bar.
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Gods I wish I had a top to troll like this
Imagine a top that isn't math brained, giving you so much more opportunities to troll before they find out...and then when they do learn something you have been trolling them....
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This is the kind of brat I can get behind. 😏
😏
As a physicist I can't understand why would anyone complain about a +jb or $\int dx f(x)$. Probably because we don't fuck
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I think rather d/dx is the operator. You apply it to an expression to bind free occurrences of x in that expression. For example, dx²/dx is best understood as d/dx (x²). The notation would be clear if you implement calculus in a program.
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