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Archived threads in /sci/ - Science & Math - 186. page
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File: Hankel-matrix.gif (2 KB, 178x156) Image search: [iqdb] [SauceNao] [Google]
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Start plotting out pi in a 3d version of a hankel matrix

There's a pattern. This is pretty significant. I would plot out this myself but I have no 3d rendering software or skills, and my 2d sketches are nearly impossible to read.

3 1 4
1.2
5....9
>>
what do you mean by plot? I presume you need some function f(x1,x2,x3,...xn) but what are the dependent variables here and what is the form of f?
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>>7730609
Thats pretty interesting brah.
How did you think of that?
>>
>>7730609
thanks anon i guess you wont mind if i publish this

File: 1443434117944.jpg (39 KB, 720x466) Image search: [iqdb] [SauceNao] [Google]
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What's a good math-oriented book on physics?

The classical textbooks (Sears, Halliday) seem very vague compared to a math textbook. I'm looking for a physics textbook written in a comprehensive way like Rudin's Principles.
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>>7730581
Landau & Lifshitz - Course of Theoretical Physics
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>>7730581
I get so sick of xkcd and that people feel the need to incessantly repost even the most inane strawman supported "points". Very few comics have any semblance of accuracy, much less utility.

It's a myopic skim-job at best.
>>
>>7730588
and not to forget, a cheap source of income for the author who happens to be a hack.

We also owe him the robot filter.

sage

File: IIT_Kharagpur_Logo.svg.png (209 KB, 915x1024) Image search: [iqdb] [SauceNao] [Google]
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Is this a good school by international standards?
>>
Trying to join the ranks of elite telemarking and tech support?
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>>7730595
nah we've got a lot of their alumni in my school's grad program
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>>7730577
if ur smart ur gonna be smart anywhere
if u aint, u aint anywhere

File: 1440936040387.jpg (54 KB, 966x788) Image search: [iqdb] [SauceNao] [Google]
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Hey /sci/

anyone in here in the bioplastics industry? Or at least have insider knowledge?

I wanna do a back of the envelope cost-benefit analysis, TL;DR how many cents/lb to turn sugar into PLA pellets
>>
>>7730571
No but I'm a chemical engineer. I can do a back of the envelope calc for you if I can find a general synthesis path from some commonly available sugar to polylactic acid.

>brb googling
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>>7730658
well I found this

also this
reading through it not quite at the relevant bits yet.

AFAIK first step is just lactic acid fermentation, which would be almost free. But then there's the purification...
>>
>>7730672
also wondering how high the yield of lactic acid would be from natural fermentation, problem being the bacteria just keep on fermenting until they die. I'm wondering if there's a way to extract or at least separate cheaply the sugars to keep the fermentation going until the bacteria just run out of sugars.

File: thesun.jpg (3 MB, 1920x1080) Image search: [iqdb] [SauceNao] [Google]
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Hello, /sci/.

Complete science neophyte here.

I was having a debate about the sun today with a coworker. He said he wished the sun would just disappear because it was blinding him at that moment. Anyway, our point of contention centered around what would happen to the Earth if the sun just instantaneously disappeared. If it just "flashed" or "zapped" or whatever out of existence.

My argument was this - that after the sun disappeared, the Earth would flash freeze immediately after the ~8 minutes it takes for solar radiation to reach us...
>>
He is.
That scene is bunk.
>>
>>7730562

>> https://what-if.xkcd.com/49/

Everything relevant that you need.
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>>7730565
I knew it was in the context of that shit-ass Hollywood garbage, but wouldn't an immediate temperature change to almost absolute zero cause the Earth to flash-freeze? If not, how long would it take?

File: image.png (23 KB, 404x197) Image search: [iqdb] [SauceNao] [Google]
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So like. I haven't done math in a long time.

I want to learn some hard math.

Is there a website that will teach me hard math and then I can do tests for free? Thanks math men.

Ps I know a guy that has a degree in math. But he's a friends brother and moved.
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>>7730538
>>
Try edx or coursera or something like that. Type "free online classes" into a search engine.
>>
>>7730538

File: CodeCogsEqn_2_.png (5 KB, 171x339) Image search: [iqdb] [SauceNao] [Google]
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I'm tripping on acid right now but I was watching this video
https://youtu.be/JrOG1tKAatg
and it made me wonder why you can do this for exponentiation if you can't do this for multiplication or addition.
>>
You can't, and it doesn't. The argument in that video shows that IF there is an x such that x^x^x^... = 2, then x must be sqrt(2) (or -sqrt(2), which the video ignores). That does not mean that such an x actually exists. (Note that this is the same process going on in your picture.)

In fact, it's not even clear whether x^x^x^... even means anything, much less what it equals. Meaningful interpretations can be given, but it's not cut and dry.
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>>7730189
i could tell you, but then i'd have to kill you
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>>7730189
Any constant, regardless of how small, will not converge to a constant when an infinite number of terms are added.
For multiplication:
The expression at the top can be simplified to
$x= \limit_{k \to \infty} 2^{\frac{1}{k}}$
which is evidently 1, but only because any number greater than 1 will diverge when multiplied infinite times. The same could be said for any constant.

File: 151218-starkiller.png (548 KB, 739x547) Image search: [iqdb] [SauceNao] [Google]
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This thing triggered me pretty hard. You can't just suck up stars and shoot them out at shit.

Anyhow star wars science thread, what in star wars is scientifically plausible, what isn't?
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>>7730168
>what in star wars is scientifically plausible
Nothing
>>
Can all the manchildren leave /sci/ please.
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>>7730171
>implying the force isn't real

File: 3832d17[1].jpg (64 KB, 500x358) Image search: [iqdb] [SauceNao] [Google]
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Explain this.
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>>7730067
Nature
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>>7730067

Sometimes images of unrelated things can be manipulated to look similar.
>>
"as above, so below".

File: 1450464660599.jpg (109 KB, 250x573) Image search: [iqdb] [SauceNao] [Google]
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What do you think about the relationship between religion and science?

https://en.wikipedia.org/wiki/Relationship_between_religion_and_science
>>
My feelings on the subject are better articulated by Heisenberg, who said:

“The first gulp from the glass of natural sciences will turn you into an atheist, but at the bottom of the glass God is waiting for you."
>>
They're different things. That's it. There is no relationship. They're not on a level playing field.
>>
Someone who in 2015 is religious clearly hasn't got a clue of what evidence is and what it's for. Consequently, they can't be a real scientist; at best they can be useful grunts that get by by aping the motions of their betters.

File: youknowme.png (15 KB, 792x612) Image search: [iqdb] [SauceNao] [Google]
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>Be me, a math major
>Civil Engineer friend comes by and sees what I am doing
>Proposes a solution
>I say that he is wrong because he is assuming things that he has not proven first.
>To make him see his mistake with a really simple similar problem I ask him to prove that there are infinitely many prime numbers
>He says that there are infinitely...
>>
>>7729843
I am a math major and I do not appreciate you extrapolating from this single event to the general case in such a fashion.
>>
>>7729843

They do if you're at Caltech or MIT. Possibly also Princeton.
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>>7729853
OP:

REKT
E
K
T

File: QnaZzCc.jpg (290 KB, 1215x1600) Image search: [iqdb] [SauceNao] [Google]
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Is the multiverse plausible? Are there good science reasons pointing to it?
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>>7729836
no
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>>7729836
It's a meme
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>>7729836
In some alternative universe, I'm with sweet 80's Molly. Reason enough to believe.

>thinks iq is scientific
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>>7729799
>just scored 115 on iqtest.com
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When will this butthurt /sjw/ raid is gonna end ? We get it you don't like IQs because white people are good at it. You don't need to make ironic shitposting threads and flood /sci/ with your butthurt all day long.
>>
>>7729818

I'm a white racist from /pol/

File: diploma.jpg (147 KB, 1557x832) Image search: [iqdb] [SauceNao] [Google]
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Just finished a B.S. in Applied Math with a minor in Econ. Ask me almost anything.
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Are you going to grad school or Wall street?
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File: Applied Math.png (6 KB, 516x138) Image search: [iqdb] [SauceNao] [Google]
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>>7729782
>Applied Math
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>>7729788
Data analysis route, going to read grad school books on econometrics, machine learning, etc. since I don't like school.

Also long-time programmer so C++ w/ Python sounds cool.

File: image.jpg (294 KB, 960x960) Image search: [iqdb] [SauceNao] [Google]
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Within 50 years I want to be a computer.

Should I get a math degree or a compute science degree?
>>
>>7729779

Get a shrink
>>
This singularity crap is the alchemy of the 21st century.
>>
>>7729794
So the mythology of it will be stripped away and it will eventually go on to inspire more rigorous studies which profoundly change our place in the universe?

Because that sounds pretty cool.

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