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Can somebody ELI5 this for my troglodyte writer brain?
operative?
Also mathematicians use i for imaginary, engineers use j. The story does not add up. I have never seen a single mathematician use j for imaginary.
Cannot confirm, we always used i.
imaJinary
TIL engineers can’t spell for shit.
As an EE, I used both. Def not a mathematician though. Fuck that, I just plug variables into programs now.
I have both mechanical and electrical backgrounds. MEs like I, EEs prefer j
$\int dx f(x)$ is standard notation for physicists
But the post says before the integral, so I understand what they did would be $dx \int f(x)$, which is disgusting
Yes but everyone knows physicists like weird notations
Thank you for the belly laugh!
Me, a language/arts person: “Huh?”
Web dev here. “Huh?”
Webdev not knowing anything about computer science (and thus mathematics)? I am shocked. Shocked!
Medical here. “Huh?”
Moron here. “Huh?”
I think rather
d/dxis the operator. You apply it to an expression to bind free occurrences ofxin that expression. For example,dx²/dxis best understood asd/dx (x²). The notation would be clear if you implement calculus in a program.If not fraction, why fraction shaped?
If you use exterior calculus notation, with d = exterior derivative, everything makes so much more sense
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
As a software dude I can see you wrote a regex, I just can’t find out what you’re trying to match.
Pardon my denseness, but is this sarcasm? Since that is a TeX snippet.
Why would a RegEx start with a
?Yeah, it is. I’m just working with what I have.
Heeyy… So when you need to express something more, well, delicate than just code, you need to use math symbols. For that you can use tex expressions. Modern markdown supports it: just copy and paste the $…$ part into any render engine
I’m scared. I think I’ll generate some backend spec to calm down.
Nooo… You should write spec and generate code, not the other way around
Is anyone doing anything tonight?
Something something distance calls for norm, not just squares.
||i||² + ||1||² = 2
Imagining your death. :P
But seriously, it’s perfectly sensible when remember that i is just the mathematical representation of “left turn”, just like -1 is the mathematical representation of “go backwards”-- and as we know, two left turns sends you backwards. So think about this triangle in the following way:
Imagine you are a snail, starting at the origin. Now imagine that you walk forward 1 step along the horizontal line. Then you turn 90° to the left to start walking along the vertical line, but then, because you need to walk i steps along this line you take another 90° turn to the left, which means that you are now walking backwards and you end up back at the origin. How far away from the origin are you? Zero steps.
This one made me laugh almost as much as the OP. Thank you!
no, d…do you have a plan?
This is the kind of brat I can get behind. 😏
😏
Fake and gay.
No way the engineer corrects the mathematician for using j instead of i.
Right? They got that shit backwards. Op is a fraud. i is used in pure math, j is used in engineering.
The mathematician also used “operative” instead of, uh, something else, and “associative” instead of “commutative”
“operative” instead of, uh, something else
I think they meant “operand”. As in, in the way dy/dx can sometimes be treated as a fraction and dx treated as a value.
I think you mean operator. The operand is the target of an operator.
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.
Engineer here, I can definitely count to 10 tho
0 1 10
0 1 everything that comes after is simply summarizes as “many”
deleted by creator
10? That’s the name some put to 1e1, right?
Electrical engineers are the ones that use j though (because i is used for current)
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.
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
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
Newfag.
(sorry! seemed like the appropriate 4chan reply)
Sure OP is a girl. Guy In Real Life
My thoughts exactly lol
sado-mathochist
Well done, truly
Better plot than 50 Shades of Grey
hehe plot. getit? math and graphs and shit
Lmfao kill yourself
I believe the correct terminology is denominator mathematician.
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.
The fun starts when you study quaternions
i^2 = j^2 = k^2 = ijk = −1This 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
I clicked your link, I barely made it out of highschool so I have no idea what any of it means, but I like reading things I shouldn’t understand anyway, sometines it’s so interesting even without understanding.
So I thank you!
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 @[email protected] your serious answer threw me off!)
Hehe, yeah, the joke was too good :P
this isn’t real
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.
OPs boyfriend is obviously an i engineer and hates j engineers. No one can stay angry at mathematicians - engineers on the other hand…
Pikachu engineer
That’s a fucking favorite now. Keeping that in my back pocket.
[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.
I agree. Clearly i is current. What is this i=√-1 nonsense.
a real mathematician would use
(0, 1)instead ofi
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
