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Archived threads in /sci/ - Science & Math - 1292. page

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File: bernhard-riemann-biography-3-1.jpg (18KB, 265x313px) Image search: [Google]
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What's the solution to the Riemann hypothesis?
18 posts and 1 images submitted.
>>
>>8436954
n
Sum of x to y to the pi to the wau tao bow i
i=0
>>
Hypotheses can never be proven (only continuously tested) so there is no solution
>>
the solution is yes

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/sci/ I am so screwed pls help me!

I have an interview tomorrow, and I need to be able to bullshit knowledge about it and try to seem competent.

I have until tomorrow. What do I do /sci/? What are some resources to study, and what are some good meme answers to say?


also
>pls no yt knighting
22 posts and 3 images submitted.
>>
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>>8436917
about Matlab I need to bullshit, sorry for leaving that out
>>
>>8436917
What's your field, OP?
>>
Too fucking late. If you have no fucking idea then you don't deserve whatever you're applying for, so at least try to be honest to yourself and don't go.

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What is a photon?
27 posts and 4 images submitted.
>>
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a weapon of choice
>>
>>8436889
A sine wave.
>>
>>8436889
Half a pound of flax.

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http://www.bbc.com/news/science-environment-37729033

What does /sci/ think ?
33 posts and 5 images submitted.
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>>8436852
We know how this will end. Only when its too late will action actually be taken.
>>
>>8436852
Jurassic period had 1800 ppm

we have a long way to go until we can build a Jurassic park
>>
>>8436855
>muh doomsday scenario

Oh god, it's 2 degrees hotter!

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If the penis diverts bloodflow from the rest of my body, is it feasible to cut it off to focus blood to my brain and become enlightened?
15 posts and 7 images submitted.
>>
>>8436612
if you dont mind getting like 2T. of blood more to your brain, sure
>>
>>8436612
do you just make these dumb threads to spam your brainy wojak memes ?
>>
>>8436612
why do you think that more bloodflow will make you 'more enlightened'? the diversion of bloodflow happens often... for instance in times of stress you lose bloodflow to the extremities and non-vital organs to allow for protection and rediversion to vital organs... doesn't make you more enlightened xD

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ITT: Favorite scientist
42 posts and 19 images submitted.
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Also

But more as a science communicator.
>>
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>>8436485
Favorite one still alive.
>>
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>>8436501
Does he even speak english?

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why do antidepressants affect serotonin and not dopamine?
25 posts and 1 images submitted.
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>>8436389
who cares?
The therapeutic effect is almost entirely of a placebo nature for the overwhelming majority of patients who take these drugs.
>>
>>8436389
"Higher expression of serotonin 5-HT(2A) receptors in the postmortem brains of teenage suicide victims."
https://www.ncbi.nlm.nih.gov/pubmed/11870006
>>
>>8436393
I can attest that you're talking shit. Antidepressants do work. Look up postsynaptic 5-HT receptor downregulation for the exact mechanism.

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What's the evolutionary reason behind wanting to bite my gf during sex?
11 posts and 2 images submitted.
>>
>>8436315
Not everything needs to have a reason.
Shit happens at random and if there isn't enough pressure against it it will keep on going
>>
>>8436315
I guess it's a sgin of domination. Lions do it to.

aslo... WHO CARES? BIT AND FUCK THAT DAMN CHICK!
>>
I want to know too.

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Next year i'm going to university and I'm pretty worried about my knowledge in Physics. At school we don't study it that much , so i thaught that I could start study something on my own. They suggested me this book. Is it good for "amateurs"? Also I'd need a pdf(or ebook) version of this book , can anyone link me one?
15 posts and 1 images submitted.
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noone?
>>
>>8436321
/sci/ is slow
here's a link to purcell's EM as a pdf
http://bookzz.org/book/2045181/d34985
the djvu files tend to be smaller, so you might want to get a djvu reader
>>
quite usefull

Let's say I have this number:
>0.999... + 0.5
0.999... is equal to 1, so the sum is for all intents and purposes 1.5

If I were to round this number, would I round it up (to 2) or down (to 1)?

Technically, it's 1.499..., so it should be rounded down (as with all numbers followed by 4), but because 0.999... = 1, my number is 1.5 and should be rounded up.

Up or down? Which one is it?
31 posts and 1 images submitted.
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>>8436201
mathematics CANNOT answer this
it is proof of its INCONSISTENCY
>>
up.

hope this helped.
>>
Occams razor, unless you're doing some weird stats thing where the rules are-clear cut (aka ALWAYS round down in this case to prevent personal interpretation and inconsistances in the data akin to significant figures)

Its obviously "closer" to 1.5. So, up.

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I did a ton of research and there is no cure for procrastination
32 posts and 8 images submitted.
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The cure is just fucking do it.

No really, it's that simple.
>>
>>8436148
The cure is to uninstall 4chan.
>>
>>8436148
You don't beat procrastination. Some people just accomplish more in lesser time. We call them geniuses. You're not.

I'll start with some piss easy vectors shit...

Show that
[eqn] r=(2,1,0) + λ(-1,2,4) [/eqn]

And

[eqn] r=(-1,3,2) + μ(2,-5,3) [/eqn]

are perpendicular
14 posts and 3 images submitted.
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Someone... Anyone?
>>
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>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.

>not for helping you with your homework
>>
>>8436091
Just a crumb of help. I am a mere spec seeking just a few bytes online to guide me in the most miniscule way.

Please offer me your help amidst the countless math you deal with daily. I will be beyond grateful

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Is there a scientific way to help me stop drinking? I've been hospitalized many times for alcohol related issues and got put in a mental ward twice. I can stop for a couple days but i always end up drinking again. Iv'e been to meetings but that made me want to drink more. Is there some scientific mental hack i can use?
13 posts and 2 images submitted.
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>>8436055
antabuse?
https://en.wikipedia.org/wiki/Disulfiram
of course you can simply refuse to take the pills
>>
>>8436055
Antabus
>>
>>8436055
get a hobby. and another idea is hypnosis but i have no idea if it would work
>>8436066
>>8436069
this just will just make a 10x worse hangover has all sorts of side effects and can actually be dangerous.

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I don't get how if we know p≡1 mod 3 or p≡ 2 mod 3 it implies that 2p+1 ≡ 0 mod 3 and 4p+1 ≡ 0 mod 3 as well?
15 posts and 1 images submitted.
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In mod 3, multiplying both sides of p ≡ 1 by 2 gives 2p ≡ 2 ≡ -1. Similarly, multiplying both sides of p ≡ 2 by 4 gives 4p ≡ 8 ≡ -1.
>>
>>8436037
There are 2 options, check them
option 1: p%3 = 1
2*1+1=3=0
4*1+1=5 =2

option 2: p%3 = 2

2*2+1=5 = 2
4*2+1=9 = 0
>>
>>8436043
>multiplying both sides of p ≡ 1 by 2 gives 2p ≡ 2 ≡ -1

wut?? -1??

>>8436057
but p > 3 so why is it 2*"1" + 1? similarly 4*"1" + 1?

youre using P = 1 in these examples I dont get it

Hello, I can't move my right foot upwards and can't move my big toe over the one next to it anymore. It feels basically like my foot is partially paralized. It will not move up at all

Can someone explain this?
I might have made my foot numb too long by sitting a certain way so I could have cut off the blood flow.
21 posts and 1 images submitted.
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Do u have potassium defieciency
>>
>>8436000

Are you a fat piece of inactive shit?
>>
the fact that you cant move your foot up would suggest damage of the deep fibular nerve, probably through compression

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