close
[a / b / c / d / e / f / g / gif / h / hr / k / m / o / p / s / t / u / v / vg / vm / vmg / vr / vrpg / vst / w / wg] [i / ic] [r9k / s4s / vip] [cm / hm / lgbt / y] [3 / aco / adv / an / bant / biz / cgl / ck / co / diy / fa / fit / gd / hc / his / int / jp / lit / mlp / mu / n / news / out / po / pol / pw / qst / sci / soc / sp / tg / toy / trv / tv / vp / vt / wsg / wsr / x / xs] [Settings] [Search] [Mobile] [Home]
Board
Settings Mobile Home
/sci/ - Science & Math

Name
Options
Subject
Comment
Verification
4chan Pass users can bypass this verification. [Learn More] [Login]
File
  • Please read the Rules and FAQ before posting.
  • Additional supported file types are: PDF
  • Use with [math] tags for inline and [eqn] tags for block equations.
  • Right-click equations to view the source.

08/21/20New boards added: /vrpg/, /vmg/, /vst/ and /vm/
05/04/17New trial board added: /bant/ - International/Random
10/04/16New board for 4chan Pass users: /vip/ - Very Important Posts
[Hide] [Show All]

Image

[Advertise on 4chan]

[Catalog] [Archive]

File: the phenotype.jpg (396 KB, 798x1200)
396 KB JPG
The new /sci/ wiki
https://4chan-science.fandom.com/wiki//sci/_Wiki

(More resources in replies)
4 replies omitted. Click here to view.
>>
File: undergradmath-1.png (296 KB, 1700x2200)
296 KB PNG
To use MathJaX, put your TeX code between [ math ] ... [ /math ] tags for inline equations or [ eqn ] ... [ /eqn ] tags for block equations.

[eqn]\zeta(s) = \sum_{n=1}^{\infty}\frac{1}{n^s} = \frac{1}{\Gamma(s)}\int_0^{\infty} \frac{x^{s - 1}}{e^x - 1} \mathrm dx[/eqn]

Note: You may preview the output by clicking the TeX button at the top left corner in the quick reply window.

Additional supported file type on /sci/ is PDF.


Reminder: /sci/ is for discussing topics pertaining to science and mathematics, not for helping you with your homework or helping you figure out your career path.

If you want advice regarding college/university or your career path, go to >>>/adv/ - Advice.
If you want help with your homework, go to >>>/wsr/ - Worksafe Requests.

The chinese quants are trading at close to speed of light due to secret government FPGA tech. All the western quant companies are shitting themselves and are going to pull out of the market soon. Get out while you still can.
>>
Ling Long told me buy the dip.
>>
I thought fast trading was banned.
>>
File: 1780237546181137.jpg (20 KB, 269x283)
20 KB JPG
>>17042915
Sounds like complete nonsense to me. Even if the Chinese had faster HFT there would still be large differences in strategy, location, jurisdiction... Do you have any sources or further information?

File: 1747958855394099.png (9 KB, 1256x1060)
9 KB PNG
Few people tend to truly grasp recurrence theories or models that predict some kind of naturalist account of an afterlife. I can understand the group that protects themselves, nothingness is very comforting, but I don't see how anyone who takes our predicament seriously can come to the conclusion that nothing happens. I see my coming into existence as an event with probability 1, and I don't know how to change that just because I've died. I've probably died a lot.

Its a terrifying blindspot that you think would encounter the greatest of consideration.
>>
>>17042882
Any model of afterlife is a model of the life you wanted to live but didn’t.
>>
>>17042882
For any recurrence model to have any meaningful value, you'd have to solve the vertiginous question first.
Even taking at face value that a perfect copy of you is certain to come into existence, there is no guarantee that you will experience the copy's experiences. And a simple thought experiment makes the prospect appear absurd:

If a perfect clone of you existed then would you not perceive the distiction between that clone and yourself? Or are you under the impression you'd be experiencing both perspectives simultaneously?
>>
>>17042882

Materialists are cursed to reinvent theology from first-principles in a fundamentally worse way.

You can't actually create copies of people, because souls are entirely unique regardless of material substrate.

I will prove my point by way of an example:

Suppose that you experience amnesia. You are now roughly in the same state of mind as everyone else who experiences amnesia.

Is there a non-zero chance of your retro-causally becoming or always having been one of those other amnesiacs, because your mental states are now very similar or even identical, if but for only a moment?

If your answer is "no", then you have already assumed the existence of a non-physical observer who is secondary to the body and has an intrinsic sense of identity.

If your answer is "yes", then you could literally get blackout drunk and then have a non-zero probability of retro-causally becoming a different person who also got blackout drunk. This doesn't seem intuitive to me.
>>
>>17042903
>Suppose that you experience amnesia. You are now roughly in the same state of mind as everyone else who experiences amnesia.
nonsense
unless two hypothetical amnesiacs have the exact same molecular structure they don't have ""roughly the same state of mind"" as each other unless you think your state of mind is only the voice in your head telling you that it is has agency and doesn't believe in hangriness
>>
>>17042882
it's okay, you're just a midwit

I am trying to make a 12v battery
The ingredients at my disposal are aluminum wire (gauge and purity unknown), copper terminals I salvaged from an outlet (purity unknown), 710ml plastic cups (PET?), salt packets (unsure if iodized or not).

I have no background in anything related. Any advice? Tips?
>>
Buy a car battery, they are only like 50 bucks or something.

Underage b& edition, also known as:

Please participate in the strawpoll so we can figure out just how underaged all of you are.

https://strawpoll.com/mpnb1wzXvy5

Previous Thread: >>17030094

This thread exists to ask questions regarding careers associated to STEM.
>Discussion on academia-based career progression
>Discussion on penetrating industry from academia
>Or anything in relation to STEM employment or development within STEM academia!
>If you have a question, before posting, read some of the older posts and ,if you can, try to answer their questions on your post. That way the thread isn't an endless log of unanswered questions.

Resources for protecting yourself from academic marxists:
>https://www.thefire.org/ (US)
>https://www.jccf.ca/ (Canada)

Information resource:
>https://sciencecareergeneral.neocities.org/

Comment too long. Click here to view the full text.
12 replies and 1 image omitted. Click here to view.
>>
>>17042269
I just said fuck it and enrolled for some post-bacc whilst I study for the MCAT. If I can't even get a fucking job with a BSc and tons of lab work, might as well try to become a physician.
>>
>>17042231
Something like optical spectroscopy, instrumentation and semiconductors

The only people doing optical spectroscopy pay 40k, the instrumentation people want someone making high throughput standardized fab equipment instead of harebrained diy setups, and the semiconductor people want someone who has done epitaxy instead of stirring gunk into a cuvette or pointing lasers at wafers.

I really thought it would be employable and in the US it might be but here the jobs just do not seem to exist.
>>
>>17042303
Oh yeah the optics people want someone who has used professional optics simulation software, the photonics people want someone who makes PIC chips, the quantum people have their whole own thing.
>>
> can't get a internship in uni because muh not qualified
> can't get entry level job after uni because there is none available everyone wants 2 years of experience thesis work doesn't matter
> lol just network bro best of luck
if they would at least give me a feedback and tell me what I lack perhaps I could work on that but its always standard
> others were better sucks to suck
>>
I’ve only seen roasties on social media getting jobs in their respective academic fields. Am I crazy or is it virtually impossible for a straight white man to get one? And at a larger scale is there a systematic denial of my group from education?

Anyone have opinions on this gent here?

Seems to be his manifolds that Einstein based his theories upon.

Really glad someone turned me on to him.

Bet HE believed in the Aether...unlike some (((people)))

I'm not expecting any great responses but maybe I'll be surprised.
13 replies and 1 image omitted. Click here to view.
>>
>>17042572
>Not really, you would get melted by other shit long before the CMB.
In free space? It would be CMB first i think. But first was not the point, the point was that its happening.
>>17042572
>So I can't understand how a bucket of water behaves if I rotate it without taking into account the reference frame of the CMB?
You can refer to the fixed stars like mach. But the CMB has basically zero rotation compared to the fixed stars and is a local thing, how else would the bucket know about the fixed stars hmmm?
>>
>>17042571
>>17042429

Ya...it's almost like they don't want their to be some form of underlying frame of reference for morality or physics.

You know, the establishment I mean.

Because if their was one it would topple (((their))) entire perspective and way of life.
>>
>>17042353
thank you sir
>>
>>17042800
Yes its very clear this is pushed. I think its this "oh all is relative" philosophy they are pushing with it. It kills common sense, thats the thing. "Relative simultaneity", "space bends" all this bullshit.
>>
another aether thread
I cant do this anymore
why can't you retarded morons just study SR and appreciate it for the mathematical elegance that has
why always insert this obsolete boring BS only to claim another point for the Aryan team or whatever you moronic /pol/tards want from the aether
just fuck off

File: IMG_6053.jpg (110 KB, 1024x824)
110 KB JPG
If I put a cube really close to my nasion and focus my eyes on it, I can see 4 sides of it since my eyes are looking at it from 2 angles, does this mean that I am now perceiving things in the 4th dimension?
1 reply omitted. Click here to view.
>>
>>17041959
Cut off part of your son's dicks going forward for all time
>>
File: Dimension.webm (2.42 MB, 784x650)
2.42 MB
2.42 MB WEBM
Do that in front of a mirror | rorrim a fo tnorf ni taht oD
>>
>>17041957
You will have to join the other Asians in Nepal now, prophet.
>>
File: EAkGXAyXkAAp9j3[1].jpg (40 KB, 1080x567)
40 KB JPG
>>17041957
If I imagine a cube in my head I can see all 6 sides (12 if you count the inside, too).
>>
>>17041957
Yes, exactly.

Moderna is ACTUALLY about to cure cancer
https://www.youtube.com/watch?v=HT6ukBZe10w
16 replies and 4 images omitted. Click here to view.
>>
>>17040927
>Doctor of Philosophy in Nursing
That is an arts PhD, like I said.
>>
>>17039059
>cure cancer
anything that deals with parasites and toxins in the body will cure cancer
>>
>>17041126
i hope you get cancer so you can prove it
>>
>>17039125
fpbp
>>
>>17039408
dumb
the more times you wake up the sooner you're likely to die
that guy is book smart but can't into logic

>>
Between zero and one. Some of you fleshbags may survive in the long term. If you're lucky. I don't want to live on a planet with unlucky people, so I may do some culling.
>>
>i need to know, i am going to die in 60 years
>>
>>17042812
zero
reminder that just because you can draw a graph of it, doesn't mean it's possible

>ruins yours sleep for a buzz you can't even feel after 3 days
Caffeine might be lowering the IQ of the whole planet through unrestful sleep
Yes, coffee is bad for you, christ is not king
3 replies omitted. Click here to view.
>>
>>17041863
only homosexuals write with a period at the end
>>
File: IMG_3756.jpg (252 KB, 2000x1125)
252 KB JPG
>>17041825
Coffee is good for you. It makes your heart go brrrr and your dick go boing. Probably makes you die young but who cares about having a slovenly sexless life anyhow
>>
>>17041825
No, coffee is not good for live fish or fish tanks, but the scent can be used effectively as a fishing attractant. So we are attracting fish in the ocean through human consumption and wastewater.
>>
>>17042018
This statement is incorrect.
>>
>>17041825
Just cancel it out with some weed, dude!

/sqt/ - simple questions thread (aka /qtddtot/)

Previous thread: >>16893204

>what is /sqt/ for?
Basic questions regarding maths and science. Also homework.
>where do I go for advice?
>>>/sci/scg or >>>/adv/
>where do I go for other questions and requests?
>>>/wsr/ >>>/g/sqt >>>/diy/sqt etc.
>how do I post math symbols (Latex)?
rentry.org/sci-latex-v1
>a plain google search didn't return anything, is there anything else I should try before asking the question here?
scholar.google.com
>where can I search for proofs?
proofwiki.org
>where can I look up if the question has already been asked here?
warosu.org/sci
eientei.xyz/sci
>how do I optimize an image losslessly?

Comment too long. Click here to view the full text.
88 replies and 16 images omitted. Click here to view.
>>
In Naive Set Theory by Halmos, he states:
"The explicit definition of an ordered pair ((a, b) = { {a}, {a, b} }) is frequently relegated to pathological set theory." What does he mean by this? Or rather, what sorts of logical fallacies can arise from Kuratowski's notion of an ordered pair?
I fail to see the potential issue at hand here and would like to be made aware of it. I can read whatever you send me.
>>
>>17041553
The term "pathological" has rather eyebrow-raising properties for most English speakers, but it is important to study multiple pathological definitions as they are designed to keep one's mind aware of the peripheries in the axioms we take for granted. In set theory it's best to study as many approaches to it's plethora of definitions as possible, as it can help you understand whether YOUR work is weak or strong, unrefined or refined.

>Halmos

He's better saved for when you want to review an undergrad book. If you want to start in a spot that doesn't leave anything obscured, I'd pick up a one-semester undergrad book in set theory and then go from there; set theory books are all the same. Just get some random dover print, or if you feel like it a Springer print (physical book, or pirated pdf).

If you feel like challenging yourself afterwards, I'd buy Axiomatic Set Theory (Dover print) by Suppes. It's an old book and very difficult as such AST books were at the time, but it's quite a useful window into things as-they-were-developing.
>>
>>17041553
>"The explicit definition of an ordered pair ((a, b) = { {a}, {a, b} }) is frequently relegated to pathological set theory."
It's a type_theory tier lie. This definition is perfectly fine. 100% accuracy in language is what make math accessible, not bullshit handwaving.
>>
Would the old ice sheets actually have had miles of sheer cliffs like this on land, or would there have been an unceremonious gradient?
>>
>>17042482
Both are possible depending on the underlying land topology and weather.

new science just dropped: before the dinosaurs started extincting, they weren't getting extinct
thanks science!
8 replies and 2 images omitted. Click here to view.
>>
>>17042423
>soientist
listen to yourself and your middle school level of communication. Do you talk like this in public, too? Or are you at least self aware enough how fucking cringe worthy the jargon of your sad little online bubble is to outsiders?
>>17042328
Frankly I have some respect for /x/, they treat fiction of their making with greater dignity and sincerity than most of /sci/ treats empirical reality, let alone physical theory.
>>
>>17042377
>Dinosaurs didn't bark you fucking idiot
Explain this then.

https://youtu.be/PNdOcALSFO8
>>
>>17042326
the guardian, probably. which mind you was published 10 months ago. meanwhile his screenshot says 5 hours ago. meaning op is a boomer faggot who probably saw this horseshit as a reposted facebook meme. that is to say that op definitely didn't track down the original source so is unable to answer your simple question
https://www.theguardian.com/science/2025/oct/23/dinosaurs-asteroid-struck-research
>>
>>17042679
Kirk is not only irrelevant to the conversation but his wife is an excellent example of what a neck pierced little cuck like him is good for: die so his jewish wife can ride the cock carousel before his body is even cold.
I always knew you were a rambling waste of space with incredibly suspect initials, but I didn't know you were also a politics obsessed American.
>Youre Talmudic,
The foreskin compromised little gremlin opined, one of the many things it screeched that day on the science board that are not science. Years have passed and I still have not seen evidence of you being able to pass a Calc II exam. You can only ramble and post screenshots of esoteric garbage, shoo.
>>
>>17042377
The little ones did.

File: frogs.jpg (191 KB, 1200x1064)
191 KB JPG
Well?
23 replies and 1 image omitted. Click here to view.
>>
>>17042840
I’m pretty sure I understand the problem better than you lol.
>>
>>17042837
I just so happen to have a very good tip from a very reliable friend of ours who knows all about these types of things that these two particular frogs do not quite get along with each other very well and so do not exactly randomly hop from pad to pad with equivalent probabilities.
If you get my drift.
>>17042843
Yes.
>>
File: IMG_2342.jpg (108 KB, 1280x720)
108 KB JPG
>>17042843
>>17042729
>>
>>17042876
it's not random unless the probability coefficient is also randomized every step
>>
>>17042729
Very nice thread OP thank you for making this image.

>>17042746
Concur.

File: IMG_0669.jpg (973 KB, 1045x1588)
973 KB JPG
Why has Heaviside been so forgotten when he was so important? I’m starting to think maybe there is a group of people trying to suppress the ideas of men like him. Perhaps, a (((conspiracy)))?
47 replies and 3 images omitted. Click here to view.
>>
Why aren't the Maxwell Equations called the Maxwell-Heaviside equations.
>>
>>17042884
Because all Heaviside did was improve the notation.
>>
>>17041136
>The 4 Maxwell's equations

Lol, I think I'm catching your sense of humor.

>20 original maxwell equations.

Heaviside took the original mathematics and simplified them for engineers and students in college I think.

He's the one who dubbed the Potentials as mathematical contrivance..."murdered from the theory" I think is how he put it.

Something tells me he was playing some Ball potentially when he did that.

Maybe they got to him.
>>
>>17042886
That's huge
>>
>>17042892
It's important and what's in common usage today, but he didn't discover the theory.

File: Tier List.png (132 KB, 1235x783)
132 KB PNG
That's right
18 replies and 4 images omitted. Click here to view.
>>
>>17039734
Ever heard of a breeder reactor?
>>
>>17039728
Nuclear and solar are the same thing. Geothermal and ocean and wind are all just aleatory currents. Oil is gross and sticky.
>>
>>17039728
Ff > wind.
>>
>>17039742
>jealous that hydro areas get free limitless energy
relocate all citizens near mountains, climate change solved
>>
>>17039729
merge S and A tier and it's basically it


[Advertise on 4chan]

Delete Post: [File Only] Style:
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
[Disable Mobile View / Use Desktop Site]

[Enable Mobile View / Use Mobile Site]

All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.