/sci/ - Science & Math

1/2, I have more at home.

i fucking hate OPS image. the text is fucked up and gives me a headache immediately. whats wrong with it?

>>6397199
no idea

>>6397199
better?

>>6397167
>math inforgrapics
>posts units of measurement

>>6397167
>>6397182
>>6397192
>>6397202
>>6397600

these are all useless shit

>>6397167
>math infograph
You mean engineering right

a page in the Preface of a recent book by Paulo Ribenboim

>>6397167

>math infographics
>contains inches

NOPE.jpeg

going to try to save this thread with random /sci/ related crap

>>6397976

>>6397978

>>6397979
le you are special infographic

>>6397983

>>6397985

>>6397987

>>6397989
a necessary read for everyone on /sci/

>>6397992
Right, I call the bollocks card on this one. Infinity, although not a number, is used in equations, just like zero is. Moreover, there very well is such thing as "larger than infinity", because, you see, infinities exist in different orders of power (not to confuse with orders of magnitude, which is applicable to numbers).

>>6398074
it's in latex so you better believe it

>>6397976
>going to try to save this thread with random /sci/ related crap
>posts /ic/ image

>>6397703
>Double stroke |R
>Bold and italic Z, Q, C

All my hate

>>6398321
Entertaining. Although it might just be easier to explain how multiplication distributes over addition.

>>6398337
Pretty sure it's suppose to build intuition during arithmetic. It's from the first chapter of Gelfand Algebra iirc

>>6398321
I'm not convinced that actually provides a simpler way of understanding it, especially if you don't know it to begin with.

>>6398339

>>6398321
...This wizard was OP.

>>6398344

>>6398350

>>6398074
And your point is?

>>6398380
Image is wrong. I'm not saying 0.(9) equals 1 or anything, but picture is clearly false.

>>6398388
What do you mean?

That series there is the very definition of 0.9..., while the limit as n->infinity, is the standard definition for a convergent series.

>>6398362

>>6398452

>>6397983
Checkmate atheists.

Great thread
Scary stuff overall.

>>6397167

How are cheat sheets going to help you learn anything?

>>6397167
I had to massively scale this down from the original.

>>6398498
Not really. The odds of me specifically being here are miniscule. The odds of *someone* being here are pretty good.

l2stats

>>6397167
Spherical Harmonics

>>6398565
l2takeajoke

>>6397167
Something most people on /sci/ probably know very little about.

>>6397167

>>6397167

thanks guys, i might look at some of these sometime.

>>6398595
is it just me or does that poop look fucking delicious

Here's a concise outline of the proof of Fermat's last theorem.

And here's a classic with a ton of information packed into one doodle: Mumford's famous drawing of the "arithmetic surface", with Manin's coordinate axes on the sides.

Here's a detailed explanation:
http://www.neverendingbooks.org/index.php/mumfords-treasure-map.html

>>6398798
Has nothing to do with science/math

>>6398776
>>6398782
>>6398784
>>6398786
>>6398787
>>6398791
>>6398793
>>6398798
>>6398800
>>6398803
>>6398805
>>6398806
>>6398810
>>6398813

Everythin' I got. Some are not math/science related, but are interesting.

Either the one in
>>6398813
has cognitive dissonance wrong, or my psyc prof was wrong. I learned that cognitive dissonance is the unpleasantness associated with having to say one thing while believing another. In short, people tend to change their beliefs over time to match what they are forced to say. I think habitual liars are immune to cognitive dissonance.

>>6397202

I don't understand why people think this is helpful. Unless you already have memorized trig identities (and thus rendering having this pic useless) then you won't really know what you're looking at. And it's labeled "math formulas" which is really vague.

I'm not trying to be overly critical here but stop spreading this shit around. Having folders full of useless or bad infographics defeats the purpose.

>>6398874
Seconded, this thread is cancer.

>>6397202
But I liked it. Once I forgot the product of sin a times sin b. I just couldn't think of it. Took me half an hour to derive it again using complex number multiplication.

I mentioned to someone who taught electronics that amplitude modulation is multiplication. He didn't believe me at first. I thought it was obvious. So I used the product of sines formula to show how the sidebands are created. He seemed unimpressed. A few weeks later he told me that one of his students said something brilliant: AM is multiplication. I didn't have the heart to tell him it wasn't one of his students.

>>6398574
Oh dear god. It's like "90% of women cheat on their boyfriends with men with 20+ inch dicks". For the future: no citations = probably bullshit; this style of lettering and colouring = probably bullshit. So we have almost definite bullshit right there.

>>6398888
>>6398888
>>6398888
>>6398888
QUADS!
Anyway, I hope that person doesn't teach anymore. I learned it in high school, for God sake!

>>6398888
dude just use <span class="math">sinz= (e^{iz}-e^{-iz})/2i[/spoiler] to derive that shit. Complex numbers make shit a lot more easier

>>6397992
>ends abstract with 'so lets give it a shot'

>>6398562
Yeah I can't read anything.

>cos

>>6399521
>cos sin

>>6399522
forgot pic

>>6399523

>>6399526
>polar coordinates

>>6399527

>>6399529

question: is there proof that there is any space at all?

>>6399545
It's ability to be bended over is the definitive proof.
>babbys first GRT

>>6399548
this also could be one of the features of energy fluctuation

also i dont think there is any proof that distance as we know it exists

>>6399548
what's a GRT?

>>6399552
General relativity theory, dawg

>>6398562
Post on HR pretty please?

>>6399567

>>6399568

>>6398874
Mostly in case you need to do something involving those formulas, but can't remember what the fuck they were.

ie I am doing something which involves cos(a+b) and for the love of me, I can never remember which is which.

But yeah, it's all just high school math...

>>6398789
I have this shirt, good shit.

>>6398794
fuckyes neverendingbooks
mumford's pictures are like porn for algebraic/arithmetic geometers

Basic but interesting to watch.

>>6397983
This is pretty much bullshit

>>6399346
He didn't teach engineers. He taught technicians. Concepts like how an antenna works and how modulation produces sidebands are a bit difficult for most people. How many people can explain maxwell's equations or how and why Fourier analysis converts from the time domain to the frequency domain? On the other hand, how many people who know those things can neutralize the final amplifier of powerful vacuum tube type radio transmitter?

going to just post related stuff on and off while watching a documentary or something.

>>6400758

Anyone has any infographic about cooking illegal narcotics at home?

>>6397167
why is there imperial on there... just only use metric...

>>6397983
load of crap

>>6401421
>not being able to adapt to multiple unit systems.
Sure, it's less than ideal, but there's no avoiding it.

>>6401445
>there's no avoiding it.

There is if you don't live in 3rd world 'MURICA.

>>6397608
>>6397681
>>6397698
I agree
>engineering majors

>>6398074
This is an awful attempt at throwing out bait. 1/10, got three replies.

>>6398789
Love this.

>>6400758
Why the hell would you want to memorize a bunch of integrals? When would that ever be useful?

>>6401460
Canada is sadly still partly afflicted with the imperial system. Sucks to be us.

>This is an awful attempt at throwing out bait. 1/10, got three replies.
You kidding me. What's wrong with that post? Aside from "order of power" being a non-existent thing _per se_.

>Why the hell would you want to memorize a bunch of integrals? When would that ever be useful?
Looks like it's you the one throwing the bait. It's useful to remember integrals of the simplest elementary functions and - guess what - such pictures exist specifically to avoid remembering stuff that's on them.

>>6399549
>also i dont think there is any proof that distance as we know it exists
well zeno's paradox gives doubt... fuck

>>6401498
I'm a professional mathematician and I couldn't tell you offhand what the integral of tan is.

>>6401498
>You kidding me. What's wrong with that post? Aside from "order of power" being a non-existent thing _per se_.
He sounds like an undergrad talking out his ass about set theory. He's mixing up meanings of words like "larger than" and "orders of power" and he doesn't even mention the extended real number system, and if he had, that post would almost be good. But he clearly doesn't know what that is.

>>6401512
You're saying infinities can be of different orders of power, but you can't say that some are larger than the others? It's formalism at it's worst.
I do do not know about extended reals thing, but I think my point still holds.

>>6401489
On the integral page, I have derivative, trig, and geometry version of that page and it's useful not to memorize but to print and have a quick sheet to refer to. You eventually memorize most of them.