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/sci/ - Science & Math


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11976795 No.11976795 [Reply] [Original] [archived.moe]

Humans? more like COOMANS

>> No.11976799

>>11976795
>Eurasia
>a small peninsula of asia is somehow a continent

>> No.11976802

>>11976795
3>1>4>2>5



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11976784 No.11976784 [Reply] [Original] [archived.moe]

Prove that every positive integer is the sum of at most 3 triangular numbers (proven by gauss :) don't cheat :) And don't feel bad if you can't get it, Gauss didn't prove this until he turned 6

>> No.11976796

>>11976784
Let n be a positive integer.
Assume n can be written as a sum of 4 triangular numbers.
By a theorem of Gauss, this is a contradiction.
Therefore every positive integer is a sum of at most 3 triangular numbers.
This completes the proof.



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11976744 No.11976744 [Reply] [Original] [archived.moe]

What is the median age for death by coronavirus? I can't seem to find the information anywhere. My guess would be between 80-85, but I want to be sure. Also median age seems like a better indicator of lethality than average age, right? But also more young people than old people contract the virus, so there are more chances for a younger person to die. But what is the median age?

>> No.11976792

Medians and averages are for brainlet faggots, get the fucking age distribution instead: https://www.cdc.gov/nchs/nvss/vsrr/covid_weekly/index.htm



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11976734 No.11976734 [Reply] [Original] [archived.moe]

Why is autism more common in males than females?

>> No.11976747

>>11976734
>why are boy more likely to be interested in things
>why are women more likely to be interested in people

>> No.11976811

>>11976734
Because it can't be diagnosed in females as easily leading to under-diagnosis since society treats women paternalistically. In women autism is not a drawback because it makes it so that they're perceived as extra cute instead of extra creepy.



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11976699 No.11976699 [Reply] [Original] [archived.moe]

Is tobacco good for you?

>> No.11976703

no lol

>> No.11976713

actually it has some health benefits but not smoking it

>> No.11976731

no but nicotine can have some uses

>> No.11976758

>>11976699
Tobacco smoke makes me feel so good that it's not even funny. I'm not even a smoker but I still love it.

>> No.11976762

>>11976699
It obviously makes you hang out with the cool kids and shit on the nerds



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11976692 No.11976692 [Reply] [Original] [archived.moe]

Let's get this old classic regoing, lads. Do you buck the stereotypical look of the traditional scientician?
Let's find out!

7 replies omitted. Click Reply to view.
>> No.11976761
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11976761

>> No.11976765
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11976765

>> No.11976770
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11976770

>> No.11976774
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11976774

>> No.11976779
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11976779



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11976683 No.11976683 [Reply] [Original] [archived.moe]

I want to seriously devote myself to studying mathematics, since I'm currently in the last year of high school and I want to pass the entrance exam to a solid university so I can study CS. I have the list of the things that will be on the entrance exam, as well as the entrance exam from the last year. Tried looking for some textbooks but I feel overwhelmed. I want to study specifically to pass the entrance exam and a bit more. I don't want to dedicate too much of my time to some complicated things which I can't use.

Any help? Do you know of any good literature that I should use? How much is the high school knowledge I already have valuable?

>> No.11976688

I'm struggling with this as well. I think there's such a thing as practical mathematics motivated by financial gain, and that motivated by curiosity.

I'm more naturally motivated by curiosity, which is as much as a luxury as it is a valuable asset.



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11976674 No.11976674 [Reply] [Original] [archived.moe]

is it true that people taking SNRI are more resistant to covid?



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11976667 No.11976667 [Reply] [Original] [archived.moe]

Don't cheat, show your method :) A 5-year-old Gauss solved this in kindergarten.

∑ from 1 to 100 x

3 replies omitted. Click Reply to view.
>> No.11976697 [DELETED] 

[math]
S=1+2+ \cdots +n \\
S=n+(n-1)+ \cdots +1 \\
2S=1+n+2+(n-1)+ \cdots n+1=n(n+1) \\
S=\frac{n}{2}(n+1)
[/math]

>> No.11976700

[math]
S=1+2+ \cdots +n \\
S=n+(n-1)+ \cdots +1 \\
2S=1+n+2+(n-1)+ \cdots +n+1=n(n+1) \\
S=\frac{n}{2}(n+1)
[/math]

>> No.11976710
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11976710

>>11976667
sum 1 to a where a is even : (a-0)+1 + (a-1)+2 + ... + ((a/2)+(a/2+1)) = (a/2)*(a/2+1)
sum 1 to 100 : 100+1 + 101+2... + 50+51 = 101*50 = 5050

>> No.11976718

>>11976710
not (a/2)*(a/2+1) but (a+1)*(a/2) fuck

>> No.11976725

>>11976718
great, now prove that every positive integer is the sum of at most 3 triangular numbers (proven by gauss :) don't cheat :)



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11976666 No.11976666 [Reply] [Original] [archived.moe]

>Yeah, I study astronomy. How'd you know?



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11976612 No.11976612 [Reply] [Original] [archived.moe]

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

what can I do with one of these?

>> No.11976625

https://youtu.be/DFmOr1vMOT4



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11976601 No.11976601 [Reply] [Original] [archived.moe]

>yeah meng, everything is subjective, 2+2 could be 5 lmaooo
the same people:
>WTF WHY WON'T YOU EXCEPT THE SCIENTIFIC CONSENSUS

>> No.11976632
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11976632

>> No.11976776 [DELETED] 

>>11976632
Science "says" there is no such thing as gender and no such thing as IQ.
Social """"Science"""" is not science

>> No.11976787
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11976787

>>11976632

>> No.11976806

Are you still butthurt that someone disagreed with you on twitter?



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11976570 No.11976570 [Reply] [Original] [archived.moe]

Partial differential equations or algebraic topology for someone with only 130 IQ?

3 replies omitted. Click Reply to view.
>> No.11976656

>>11976586
wtf PDEs are far easier than Algebraic Topology. Engicucks are capable of grasping them for goodness' sake.

>> No.11976658

>>11976656
O yeah? Solve a pde analytically that's not the wave or heat equation.

>> No.11976661

>>11976658
:/

>> No.11976662

>>11976661
That's what I thought

>> No.11976702

>>11976658
how often are PDEs used in higher dimensional studies (string theory)



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11976537 No.11976537 [Reply] [Original] [archived.moe]

scientifically, is there another way?

>> No.11976553

creative activity, like drawing or composing

>> No.11976560

Live a fulfilling routine that doesn't rely on whims or chemicals. If you are really in the gutter mentally then start with doing your laundry or something.

>> No.11976565

smoke weed jerk off and play vidya

Trust me, I am an expert.

>> No.11976578

>>11976537
Going for a jog every now and them might help. Physical activity is vital to sustained happiness. Sitting in your room all day like a lazy slob is going to make you depressed.

>> No.11976581

>>11976578
this is true, plus sports can be fun.

if you want the weed/jerkoff/vidya combo to hit extra hard working out does help.



File: 164 KB, 732x862, learning.png [View same] [iqdb] [saucenao] [google] [report]
11976536 No.11976536 [Reply] [Original] [archived.moe]

Is this the best place to start studying?



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11976528 No.11976528 [Reply] [Original] [archived.moe]

I haven't done any significant maths since secondary school about 5 years ago when I was 15-16. Where do I start with it?



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11976526 No.11976526 [Reply] [Original] [archived.moe]

I woke up in the middle of the night with half of my face and half of my arm numb, and had to rub on them for a bit until blood started pumping in. Did I just suffer a stroke, though? Because that was my immediate thought as it happened and I’m still frightened by the possible complications that might occur, if they haven’t already. There’s no brain fog, nor do I have any problem regarding clumsiness and what not.
But, is there a chance I actually suffered a stroke as well as permanent brain damage?
I’m really afraid of the possibility of the long-term injury aspect involved in it.

>> No.11976535

>>11976526
So you slept on your face and arm and woke up with them feeling numb... hmmmmmmmmm

>> No.11976545

>>11976526
You should definitely ask a Cantonese knitting board instead of a doctor, you're off to a good start.

>> No.11976614

>>11976526
You're in this site.
You're already brain damaged.



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11976512 No.11976512 [Reply] [Original] [archived.moe]

Does IQ correlate with life expectancy well?
Does it also explain it?

>> No.11976680

https://www.scientificamerican.com/article/research-confirms-a-link-between-intelligence-and-life-expectancy/

>> No.11976728

>>11976512
By definition, IQ is a measure of how intelligent a person is based on what the society sees as useful. So my opinion is that they get to live better lives in a society as long as they keep doing them favors. Society keeps them alive, and high IQs get to keep the society alive. Anyway that's just my opinion.



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11976491 No.11976491 [Reply] [Original] [archived.moe]

>While asleep, I had an unusual experience. There was a red screen formed by flowing blood, as it were. I was observing it. Suddenly a hand began to write on the screen. I became all attention. That hand wrote a number of elliptic integrals. They stuck to my mind. As soon as I woke up, I committed them to writing.

>> No.11976504
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11976504

MY CRIMSON LIQUID SO FRANTICALLY SPILLED
THE RUBY FLUID OF LIFE UNLEASHED

RIPPLES ASCEND TO THE SURFACE OF MY EYES
THEIR RED PENS DRAWING AT RANDOM, AT WILL

HEED - IT COMMANDS, HEED MY WILL
BLEED - IT SAYS, BLEED YOU WILL



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11976421 No.11976421 [Reply] [Original] [archived.moe]

Is this a meme?
How applicable is control theory in physics?

All I can find about this topic is written by two guys, a russian named A. L. Fradkov and a guy named John Bechhoefer.

2 replies omitted. Click Reply to view.
>> No.11976594

https://youtu.be/oBc_BHxw78s

it's a meme, it's on yotube and wikipedia. Both unreliable sources.

>> No.11976615

>>11976448
That's funny I was doing that in my engineering bachelors, I thought physics was superior to engineering?

>> No.11976620

>>11976516
To apply control you need to be an engineer, chemical, mechanical, electrical or aeronautical, anything else is a poor imitation of the subject, you'll probably learn some undergraduate level shit and not understand the subject at all.

>> No.11976660

>>11976620
The classes I plan to take are offered by the engineering department. There's nothing similar to control in the physics curriculum.

Papers like these:

https://www.sciencedirect.com/science/article/pii/S1474667017353880/pdf?md5=92eacfff5634355da4b468318cdda5b5&pid=1-s2.0-S1474667017353880-main.pdf
https://www.google.com/url?sa=t&source=web&rct=j&url=http://citeseerx.ist.psu.edu/viewdoc/download%3Fdoi%3D10.1.1.124.7043%26rep%3Drep1%26type%3Dpdf&ved=2ahUKEwisgoPJiYTrAhVXHrkGHbBABbcQFjAWegQIBhAB&usg=AOvVaw1KN25HuE2cUcv9AVF8qfHR&cshid=1596631225196

Made me question whether control is something that is applicable in the realm of physics. On the other hand, I can only find stuff written by those two authors >>11976421

>> No.11976671

>>11976421
So some physical questions are questions of stability, I believe turbulence is one. So if you like fluids there's probably some physics there to discover because we know so little about turbulence. Aeroelastic flutter is another example of a stability problem the structures engineers do when designing a plane. For complicated structures there's definitely more physics to discover in that field. I once knew a guy who did his phd thesis on quantum control, I guess it's a thing.



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