Why would a mathematician use j for imaginary numbers and why would engineer be mad at them?
UwU brat mathematician behavior
Submitted 8 months ago by fossilesque@mander.xyz to science_memes@mander.xyz
https://mander.xyz/pictrs/image/a9b2c785-b0aa-4481-a49c-7f7fc6e40b5f.png
Comments
laserm@lemmy.world 8 months ago
prex@aussie.zone 8 months ago
I think it might be the wrong way around: Engineers like to use j for imaginary numbers because i is needed for current.
CyanideShotInjection@lemmy.world 8 months ago
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.
dandelion@lemmy.blahaj.zone 8 months ago
fake and gay?
AlboTheGuy@feddit.nl 8 months ago
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.
answersplease77@lemmy.world 8 months ago
so after he angered his bf he got fucked as in trouble with him or sex? raped? wtf lol
jyl@sopuli.xyz 8 months ago
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.
Neverclear@lemmy.dbzer0.com 8 months ago
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.
tfowinder@beehaw.org 8 months ago
Learned a new word, Hate ****
jyl@sopuli.xyz 8 months ago
Hate ****
I too take hate shits on the toilet.
MrShankles@reddthat.com 8 months ago
Anger bang
Almacca@aussie.zone 8 months ago
I have no idea what they’re talking about, but I do love a happy ending.
BudgetBandit@sh.itjust.works 8 months ago
I love how that wannabe 4chan nerd just got outnerded in the comment section
Etterra@discuss.online 8 months ago
Can somebody ELI5 this for my troglodyte writer brain?
int_not_found@feddit.org 8 months ago
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 comes to 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.
BlackRoseAmongThorns@slrpnk.net 8 months ago
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.
voldage@lemmy.world 8 months ago
I also use dollars instead of integral symbols, I don’t do math though.
davidagain@lemmy.world 8 months ago
Thank you for the belly laugh!
iAvicenna@lemmy.world 8 months ago
operative?
zeca@lemmy.eco.br 8 months ago
The associativity thing also doesnt make sense.
Unlearned9545@lemmy.world 8 months ago
Engineer here: mostly use i, but have seen j used plenty. First time I saw j used was by a maths professor.
iAvicenna@lemmy.world 8 months ago
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.
jenesaisquoi@feddit.org 8 months ago
Cannot confirm, we always used i.
SanicHegehog@lemmy.world 8 months ago
imaJinary
TIL engineers can’t spell for shit.
sartalon@lemmy.world 8 months ago
As an EE, I used both. Def not a mathematician though. Fuck that, I just plug variables into programs now.
the_tab_key@lemmy.world 8 months ago
I have both mechanical and electrical backgrounds. MEs like I, EEs prefer j
itslilith@lemmy.blahaj.zone 8 months ago
$\int dx f(x)$ is standard notation for physicists
cooligula@sh.itjust.works 8 months ago
Put the post says before the integral, so I understand what they did would be $dx \int f(x)$, which is disgusting
jenesaisquoi@feddit.org 8 months ago
Yes but everyone knows physicists like weird notations
Phoenix3875@lemmy.world 8 months ago
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.yetAnotherUser@discuss.tchncs.de 8 months ago
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) ∆.bhamlin@lemmy.world 8 months ago
If not fraction, why fraction shaped?
Amir@lemmy.ml 8 months ago
If you use exterior calculus notation, with d = exterior derivative, everything makes so much more sense
Kolanaki@pawb.social 8 months ago
Me, a language/arts person: “Huh?”
axEl7fB5@lemmy.cafe 8 months ago
Web dev here. “Huh?”
lena@gregtech.eu 8 months ago
Fullstack dev here. “Huh?”
jenesaisquoi@feddit.org 8 months ago
Webdev not knowing anything about computer science (and thus mathematics)? I am shocked. Shocked!
Sterile_Technique@lemmy.world 8 months ago
Medical here. “Huh?”
nfamwap@feddit.uk 8 months ago
Moron here. “Huh?”
vivalapivo@lemmy.today 8 months ago
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
RamblingPanda@lemmynsfw.com 8 months ago
As a software dude I can see you wrote a regex, I just can’t find out what you’re trying to match.
AusatKeyboardPremi@lemmy.world 8 months ago
Pardon my denseness, but is this sarcasm? Since that is a TeX snippet.
Why would a RegEx start with a
$?vivalapivo@lemmy.today 8 months ago
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
Thordros@hexbear.net 8 months ago
I believe the correct terminology is denominator mathematician.
OsrsNeedsF2P@lemmy.ml 8 months ago
Better plot than 50 Shades of Grey
xx3rawr@sh.itjust.works 8 months ago
hehe plot. getit? math and graphs and shit
OsrsNeedsF2P@lemmy.ml 8 months ago
Lmao kill yourself
woodenghost@hexbear.net 8 months ago
But physicists actually do that? They often write it like this: ∫ dx f(x) or this: ∫∫∫ dxdydz f(x,y,z)
CosmicTurtle0@lemmy.dbzer0.com 8 months ago
This is the kind of brat I can get behind. 😏
_g_be@lemmy.world 8 months ago
😏
ShinkanTrain@lemmy.ml 8 months ago
davidagain@lemmy.world 8 months ago
This one made me laugh almost as much as the OP. Thank you!
Randelung@lemmy.world 8 months ago
Something something distance calls for norm, not just squares.
||i||² + ||1||² = 2
bitcrafter@programming.dev 8 months ago
Imagining your death.
ayyy@sh.itjust.works 8 months ago
Why are we still visiting literal pro-Nazi websites?
djsoren19@lemmy.blahaj.zone 8 months ago
Gods I wish I had a top to troll like this
Jarix@lemmy.world 8 months ago
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…
djsoren19@lemmy.blahaj.zone 8 months ago
No, in my experience people like that just end up trolling me because they have no frame of reference and don’t care about reality. You can’t troll somebody with math if they reject the idea of learning anything about or using math.
Droggelbecher@lemmy.world 8 months ago
Physicist behavior
_stranger_@lemmy.world 8 months ago
sado-mathochist
burntbacon@discuss.tchncs.de 8 months ago
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.
Seasm0ke@lemmy.world 8 months ago
Well done, truly
marcos@lemmy.world 8 months ago
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.
OrganicMustard@lemmy.world 8 months ago
If you were using nonstandard analysis with dx an infinitesimal you could put it outside I guess. Maybe with differential forms too?
kogasa@programming.dev 8 months ago
In the context of differential forms, an integral expression isn’t complete without an integral symbol and a differential form to be integrated.
marcos@lemmy.world 8 months ago
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.
LeFrog@discuss.tchncs.de 8 months ago
Physicists be like: whitness me
marcos@lemmy.world 8 months ago
Nobody on your link is treating the integral “operator” as multiplicative.
edinbruh@feddit.it 8 months ago
Relationship goals
selokichtli@lemmy.ml 8 months ago
They both bottoms.
Zagorath@aussie.zone 8 months ago
Fake and gay.
No way the engineer corrects the mathematician for using j instead of i.
lemmy_outta_here@lemmy.world 8 months ago
NGL, this is hot.
PM_ME_VINTAGE_30S@lemmy.sdf.org 8 months 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.
jsomae@lemmy.ml 8 months ago
My initial thought was that it’s surprising that the engineer is using i whereas the mathematician is using j. But I know some engineers who are hardcore in favour of i. No mathematicians who prefer j though. So if such an engineer were dating a mathematician of all people who used j, I could see that being ♠ .