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Why would a mathematician use j for imaginary numbers and why would engineer be mad at them?
The only thing I can think of is that the OP studied electrical engineering at some point. But it’s a 4chan story so probably fake anyway.
I think it might be the wrong way around: Engineers like to use j for imaginary numbers because i is needed for current.
Mathematicians are taught to be elastic with notation, because they tend to be taught many different interpretations of the same theory.
On the other hand engineers use more strict and consistent notation, their classes have a more practical approach.
Using the same notation makes it faster to read and apply math, a more agile approach helps with learning new theories and approaches and with being creative.
I have no idea what they’re talking about, but I do love a happy ending.
so after he angered his bf he got fucked as in trouble with him or sex? raped? wtf lol
Wtf mate, nothing that serious. Anon teased him and the score was settled when they did the thing later that night.
The story looks pretty fake and gay anyway, but it’s more wholesome than your idea.
hate fuck:
An act of aggressive sex with someone as if they had no respect for the person as an equal human being, regardless if they actually do, or not. Hate fucking usually entails aggressive, sometimes violent, degrading, and humiliating sexual acts and behaviors perpetrated by an aggressive party onto a submissive, solely in the interest of the aggressor’s own pleasure and amusement, and without regard for the submissive party’s enjoyment or well being.
Unlike rape, hate fucking is a form of consensual sex where the submissive party has agreed (for whatever reason) to accept the treatment and behavior of the aggressor.
Though unlike proper BDSM, the submissive party has not previously discussed boundaries, likes or dislikes, and doesn’t necessarily enjoy all, or even any of the treatment they receive.
I love how that wannabe 4chan nerd just got outnerded in the comment section
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.
The associativity thing also doesnt make sense.
imaJinary
TIL engineers can’t spell for shit.
Engineer here: mostly use i, but have seen j used plenty. First time I saw j used was by a maths professor.
Interesting I never saw j from a maths person. Friends (from a decade ago!) in electronics eng dep said they use j because i was reserved for current. perhaps the latter depends on the department.
j is pretention when a math doer does it. j is for engineers and you don’t even understand the bubble ratio filtering equation let alone be asking to envision what temp you did the mAEth in.
You got lost in the number of letters instead of realizing the MeTowel’s important presence til that EOTU moment of that manufa turing of Big Black Goles you get to watch it all happen again as Thanos facepalms.
Cannot confirm, we always used i.
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
Can somebody ELI5 this for my troglodyte writer brain?
Integrals are an expression that basically has an opening symbol, and an operation that is written at the end of it that is used also as a closing symbol, looks kinda like:
{some function of x} dx.The person basically said “the dx part can be written at the start also, and that would make my so mad :3”:
dx {some function of x}.This gets their so mad because understandably this makes the notation non-standard and harder to read, also you’d have to use parentheses if the expression doesn’t just end at the function.
Note: dollar used instead of integral symbol
I also use dollars instead of integral symbols, I don’t do math though.
An integral is usually written like ∫ f(x) dx or alternatively as df(x)/dx. Please note that this is just a way to apply the operation ‘Integration’, like + applies the operation ‘Addition’. There is no real multiplication or division.
But sometimes you can take a shortcut and treat dx as a multiplied constant. This is technically not correct, but under the right circumstances lands you at the same solution as the proper way. This then looks like this ∫ f(y) dy/dx dx = ∫ f(y) dy
Another thing you can do is to move multiplicative constants from inside the Integral to in front of the Integral: ∫ 2f(x) dx = 2 ∫ f(x) dx. (That is always correct btw)
What anon did was combine those two things and basically write ∫ f(x) dx = dx ∫ f(x). Which is nonsensical, but given the above rules not easily disproven.
This is more or less the same tactic used by internet trolls just in a mathy way. Purposefully misinterpreting arguments and information, that cost the other party considerably more energy to discover and rebut. Hence the hate fuck.
$\int dx f(x)$ is standard notation for physicists
Yes but everyone knows physicists like weird notations
But the post says before the integral, so I understand what they did would be $dx \int f(x)$, which is disgusting
Me, a language/arts person: “Huh?”
Web dev here. “Huh?”
Fullstack dev here. “Huh?”
Webdev not knowing anything about computer science (and thus mathematics)? I am shocked. Shocked!
Medical here. “Huh?”
Moron here. “Huh?”
Learned a new word, Hate ****
Hate ****
I too take hate shits on the toilet.
Anger bang
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.
That’s hilarious. You’re not seeing what’s going on backwards just like that (as I point at the point going nowhere shitty) in an equation that is finding as many clAEver ways to say something you actually not caring about talking about.
That’s like, "How many time van express the only thing that van’t be done until the 'verse itself tries to do what can’t be done and sever your…
…Oh, I see…you don’t have ([of course, because you can’t have to give {is}) nothing)] to give.
Unable to sea time doesn’t mean we can’t see(k)ER the mAETh.ac(k).cc(k).08
The only thin(g):(k) that doesn’t ever be never, is not at alla hack(g)in(g).G your lackthereof to divi…
Is this a copypasta or are you having a stroke?
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.
Having worked with electrical engineers, some of them are quite smart, the rest have lead poisoning.
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
Electrical engineers are the ones that use j though (because i is used for current)
I am used for current
10? That’s the name some put to 1e1, right?
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
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.
The operand is the target of an operator
Correct. Thus, dx is an operand. It’s a thing by which you multiply the rest of the equation (or, in the case of dy/dx, by which you divide the dy).
I’d say the $\int dx$ is the operator and the integrand is the operand.
You’re misunderstanding the post. Yes, the reality of maths is that the integral is an operator. But the post talks about how “dx can be treated as an [operand]”. And this is true, in many (but not all) circumstances.
∫(dy/dx)dx = ∫dy = y
Or the chain rule:
(dz/dy)(dy/dx) = dz/dx
In both of these cases, dx or dy behave like operands, since we can “cancel” them through division. This isn’t rigorous maths, but it’s a frequently-useful shorthand.
I do understand it differently, but I don’t think I misunderstood. I think what they meant is the physicist notation I’m (as a physicist) all too familiar with:
∫ f(x) dx = ∫ dx f(x)
In this case, because f(x) is the operand and ∫ dx the operator, it’s still uniquely defined.
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
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.
no, d…do you have a plan?
This one made me laugh almost as much as the OP. Thank you!
sado-mathochist
Thado-mathocist. The real chad all along.
It makes me wonder if somewhere out there in a multiverse, a community of lisping incels all collectively draw the chad wojak as as an aramaic looking dude.
Well done, truly
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.I just think of the definition of a derivative.
dis just an infinitesimally small delta. Sody/dxis literally justlim (∆ -> 0) ∆y/∆x. which is the same aslim (x_1 -> x_0) [f(x_0) - f(x_1)] / [x_0 - x_1].Note:
∆ -> 0isn’t standard notation. But writing∆x -> 0requires another step of thinking:y = f(x)therefore∆y = ∆f(x) = f(x + ∆x) - f(x)so you only need∆xapproaching zero. But I prefer thinkingd = lim (∆ -> 0) ∆.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
This is the kind of brat I can get behind. 😏
😏
