[Boards: 3 / a / aco / adv / an / asp / b / bant / biz / c / can / cgl / ck / cm / co / cock / d / diy / e / fa / fap / fit / fitlit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mlpol / mo / mtv / mu / n / news / o / out / outsoc / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / spa / t / tg / toy / trash / trv / tv / u / v / vg / vint / vip / vp / vr / w / wg / wsg / wsr / x / y ] [Search | Free Show | Home]

Archived threads in /sci/ - Science & Math - 720. page

This is a blue board which means that it's for everybody (Safe For Work content only). If you see any adult content, please report it.

File: 1466804964339.png (154KB, 672x537px) Image search: [Google]
1466804964339.png
154KB, 672x537px
My polynomial time integer factoriser is done... the solution ended up being surprisingly straightforward. I almost want to call it "obvious" but of course it's a lot easier to say that in hindsight. It can't really be all /that/ obvious if no-one else found it until now (that we know of). Still, it's only ~2k lines of non-generated C and 200 lines of Python (for some generated C which was a bit too much for the preprocessor).

2048bit inputs take around 12 minutes on my Haswell chip. 4096bit is a little over 3 hours. I don't think my solution is parallelisable at all unfortunately; I might be/hopefully am wrong about that.

My question is, who do I take this to? I obviously can't just reveal this publicly.

Pic unrelated.
inb4
>post proof
>factorise this key
>etc
If I post undeniable proof, or even reasonably convincing evidence, it would attract an awful lot of attention. I need to maintain some plausible deniability on this; claim I was joking or mistaken.
23 posts and 2 images submitted.
>>
>>8756935
You clearly want attention from it. What's wrong with attracting attention by factoring a number for us?
>>
>>8756935
computational time is considered with respect to the size of the input
>>
>>8756956
I actually don't... there's a reason I'm posting anonymously on obscure imageboards instead of shouting from the virtual rooftops. Like I said, I need to be able to deny it. For instance if I'm approach by people who I don't want to possess this.

>>8756960
...yes? I don't get your point. Are you just asking for its actual time complexity? It's around O(n^4), where n is obviously the number of bits in the input.

File: 5bb.gif (640KB, 200x157px) Image search: [Google]
5bb.gif
640KB, 200x157px
>sit in on signal processing class to see how much of a joke engineering classes are
>professor says Dirac Delta "function"
52 posts and 8 images submitted.
>>
>>8756447
How many times are you going to make this thread matey?
>>
>>8756447
How many times are you going to make this thread matey?
>>
>>8756447
How many times are you going to make this thread matey?

File: 1475123792888.jpg (64KB, 499x499px) Image search: [Google]
1475123792888.jpg
64KB, 499x499px
What kind of chemistry is most valuable for me to study at uni to be able or get a good understanding of how to do drugs? Organic chemistry? Analytic chemistry?
15 posts and 3 images submitted.
>>
>>8755980
>how to do drugs
>>
>>8755980
how to do drugs is biochemistry
>>
Pchem

I'm beginning to studying Category theory. What are you studying? Doesn't need to be math only related, this is open to any STEM field.

Be sure to include any tutorials / books / blogs / podcast
71 posts and 7 images submitted.
>>
>>8754344
Topology
Theory of computation
African studies
>Be sure to include any tutorials / books / blogs / podcast
https://ocw.mit.edu/index.htm
>>
>>8754349
what topology book you using
>>
>>8754344
Functors of local artin rings

File: 1466992491652.png (195KB, 1650x1050px) Image search: [Google]
1466992491652.png
195KB, 1650x1050px
The previous one (>>8728665) is past bump limit, thus a new thread is to be made!
>what are you researching?
>what are you studying?
>any good problems?
>book recommendations?
>cool theorems?
326 posts and 78 images submitted.
>>
>>8748188
>implying that anyone in this board is older than 15 and have a decent grasp of mathematics
>>
File: 1457388454149.jpg (25KB, 335x268px) Image search: [Google]
1457388454149.jpg
25KB, 335x268px
>>8748199
>implying that anyone in this board is older than 15 and have a decent grasp of mathematics

https://en.wikipedia.org/wiki/Psychological_projection

>Psychological projection is a theory in psychology in which humans defend themselves against their own unconscious impulses or qualities (both positive and negative) by denying their existence in themselves while attributing them to others.[1] For example, a person who is habitually rude may constantly accuse other people of being rude. It incorporates blame shifting.
>>
File: solve (2).jpg (233KB, 1280x720px) Image search: [Google]
solve (2).jpg
233KB, 1280x720px
>>8748188
>what are you researching?
Topological superconductors and CFT.
>what are you studying?
https://arxiv.org/abs/1506.05805
>any good problems?
See pic.
>book recommendations?
Turaev for TQFT and Bernevig for TSc/TI.
>cool theorems?
Verlinde formula :DDD

File: arbeit.jpg (202KB, 704x1052px) Image search: [Google]
arbeit.jpg
202KB, 704x1052px
what would be the easiest way to evaporate 750ml dichloromethane?
i have no chemistry equipment and i only need the solute
314 posts and 65 images submitted.
>>
So when you multiply two complex numbers together, you also multiply their magnitudes together. What I want to know is if this behavior was used as an argument for the "realness" of complex numbers.

Also, how long did it take for somebody to figure out the square root of i? Was it known immediately after the concept of i was developed?
>>
>>8748206
>What I want to know is if this behavior was used as an argument for the "realness" of complex numbers.
what do u mean by this

>Also, how long did it take for somebody to figure out the square root of i?
theres two square roots, and taking roots in C is easy if you just use the geometry of the plane
>>
>>8748174
DCM evaporates in air at STP. so you can increase the surface area and airflow to speed up the process, but that's about it. what drug are you making?

File: 1489143981546s.jpg (6KB, 250x187px) Image search: [Google]
1489143981546s.jpg
6KB, 250x187px
Consider two brainlets A and B.

> A. He doesn't believe in Evolution
> B. He believes it but doesn't understand how it works and think it's a goal oriented process

Who would you prefer debating / arguing with?
11 posts and 3 images submitted.
>>
Neither. I would just wait until brainlets die off from natural selection.
>>
i never engage in such pointless arguments
>>
>>8761626
B, because it's easier to correct a misconception than attempt to change the views of a willfully ignorant religious zealot.

File: eyeshed_0.png (305KB, 640x430px) Image search: [Google]
eyeshed_0.png
305KB, 640x430px
How am I supposed to be a Christian when its filled with paranormal and supernatural fairytales?

I've been invited to Catholic, Lutheran, non-denominational, and Mormon churches and every time, it goes back to me not genuinely believing in Jesus' supernatural bullshit. The LDS Church is far crazier in the stuff they believe.

What do bros? I wanna be a part of a cohesive culture, and atheists are cringeworthy
14 posts and 1 images submitted.
>>
>>8761570
Christian Orthodox is the coolest religion, and most people don't know enough to question you about it.

Other than that, agnostic atheist is the only way.
>>
>>8761576
This.
>>
>>8761570
Because you are unable to get over your idolatry of your own mental faculties. You need to accept that your brain is ultimately not capable of understanding anything about the nature of the universe. I don't see how you can't believe in miracles if you have already accepted that the universe has an omnipotent, omniscient creator. After that the rest is small potatoes.

File: file.png (1MB, 1891x913px) Image search: [Google]
file.png
1MB, 1891x913px
I thought this was a meme
33 posts and 1 images submitted.
>>
Dude we need to make kids try everything, we have zero fucking clue what they're going to do for money when they're adults.
>>
>>8761344
I don't really see the problem with trying to get kids interested in science.
>>
>>8761344
This is a good thing.

Way to go Amazon!

I am more likely to support Amazon now that I have reached a positive feedback stimulus from it.

Yay capitalism!

File: IMG_0668.jpg (30KB, 600x200px) Image search: [Google]
IMG_0668.jpg
30KB, 600x200px
>people unironically look to mythbusters as a source of accurate scientific information
Why?
13 posts and 1 images submitted.
>>
Must be the moustaches
>>
It's kids and teenagers mostly. 99% of the time they're more about dispelling stupid shit you see in movies and shows than actually proving scientific ideas and "myths" wrong. It's a show about sensationalism and blowing shit up, not accurate research done by professionals with peer reviews.

It's kinda hysterical how full of themselves Adam and Jamie have gotten at this point. Seeing them claim to be skeptics and then missing the most informative basic shit is just amazing.
>>
>>8761164
>implying their experiments aren't well done
>implying they aren't disproving practical feasibility instead of scientific theory

its intuitive empiricism in a very accessible form.

File: image.jpg (44KB, 657x527px) Image search: [Google]
image.jpg
44KB, 657x527px
>80% of all posts on /sci/ are by the same 20% shitposters

Why is Zipf's law literally fucking everywhere? Is this evidence for intelligent design?
12 posts and 1 images submitted.
>>
>>8760925
That's pareto's law
>>
>>8761400
This OP
You can calculate the entropy for all of those distributions and find that they are merely a consequence of entropy's tendency to go towards a maximum.
>>
>>8760925
It's more of a cool rule of thumb desu.

File: 1476634283471.jpg (79KB, 636x502px) Image search: [Google]
1476634283471.jpg
79KB, 636x502px
>tfw 80 measured iq brainlet but it hasn't really impacted me that hard and my favourite video game genres are RTS/RTT

an I the smartest brainlet on the planet?
14 posts and 2 images submitted.
>>
>using video game preference as proof of intellectual integrity
You really are 80 IQ
>>
>>8760857
Obviously b8 but RTS games bare minimum thinking on the fly. They're all games of hand dexterity and reflexes. The only strategy involved is autistically researching and practising a memorised build order until you can't possibly mess up no matter how much your enemy fugs your shit up. There's no time to think in RTS when you can just memorise
>>
>>8760887
>Obviously b8 but PHYSICS bare minimum thinking on the fly. They're all COURSES of hand dexterity and reflexes. The only THINKING involved is autistically researching and practising a memorised PROBLEM SOLVING order until you can't possibly mess up no matter how much your TEACHER fugs your TEST up. There's no time to think in PHYSICS when you can just memorise.

sorry mate but it's all the same. Only philosophy involves actual thinking.

File: enhanced-2659-1445978999-5.jpg (41KB, 500x373px) Image search: [Google]
enhanced-2659-1445978999-5.jpg
41KB, 500x373px
If strings have mass, can we cram enough of them to create a tiny black hole? Will that black hole vibrate the same way as a string does?
19 posts and 2 images submitted.
>>
>>8760524
From what I understand strings do not have mass they are pure energy, so no.
>>
>>8760525
How the fuck can a string be energy from, dumbass? How do you measure the length of energy? Idiot.
>>
String Theory is bullshit. I can't believe there are still people who take it seriously.

What documentaries are good to learn shit from?
40 posts and 5 images submitted.
>>
>>8760513
There are no such documentaries.
Pick up a textbook on the subject.
>>
>>8760515
I'm not much of a reader
>>
>>8760515
What's about something to reinforce your learning? Like I read the textbooks but I'd like to watch something interesting that's /sci/ related

Is autodidactism a meme in 2017?
15 posts and 1 images submitted.
>>
>>8760408
nope, its more viable then over before! assuming your not a brainlet
>>
>>8760408
mostly. something like >>8760240 is the best way to go since you'll be trusted but still self learn and do your own exploration into your field of study which 95% of students don't do because they're morons who don't even care and think they just need to get an A in their classes like the sheep they are with no thought put into what they're truly learning. i would not trust someone that just read some textbooks in their bedroom to help me design a nuclear power plant or something.

t. professional engineer - nuclear
>>
>>8760408
Nope, the Internet has an ever-increasing body of knowledge in the form of excellent texts, lectures (though fucking blind people are getting many of these removed from the Internet through abuse of the ADA), and interactive resources. There has never before been a time in human history when so much information has been so freely available.

Pages: [First page] [Previous page] [710] [711] [712] [713] [714] [715] [716] [717] [718] [719] [720] [721] [722] [723] [724] [725] [726] [727] [728] [729] [730] [Next page] [Last page]

[Boards: 3 / a / aco / adv / an / asp / b / bant / biz / c / can / cgl / ck / cm / co / cock / d / diy / e / fa / fap / fit / fitlit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mlpol / mo / mtv / mu / n / news / o / out / outsoc / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / spa / t / tg / toy / trash / trv / tv / u / v / vg / vint / vip / vp / vr / w / wg / wsg / wsr / x / y] [Search | Top | Home]

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
Read more on this topic here - https://archived.moe/talk/thread/1694/


If you need a post removed click on it's [Report] button and follow the instruction.
DMCA Content Takedown via dmca.com
All images are hosted on imgur.com.
If you like this website please support us by donating with Bitcoins at 16mKtbZiwW52BLkibtCr8jUg2KVUMTxVQ5
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.
This is a 4chan archive - all of the content originated from that site.
This means that RandomArchive shows their content, archived.
If you need information for a Poster - contact them.