Archived threads in /sci/ - Science & Math - 278. page

Images are sometimes not shown due to bandwidth/network issues. Refreshing the page usually helps.

White to move, who is favoured /sci//?

77 Replies / 7 Images
View Thread

>>

>>7654806

queen on d7 then either advance the pawn or get rid of the knight depending on what black does

>>

black because i just reported you

>>

>>7654815

to the chess.com staff that is

How do you explain the fact that out of endless possibilities of combinations of arbitrary parameters all of which would lead to nothing in particular, the specific combination of arbitrary parameters that constitute our physical world led to us and all this?

26 Replies / 2 Images
View Thread

>>

>>7654778

In whatever kind of wasteland exists outside of our universe, there are no physical laws (e.g. of conservation of mass/energy) to bar universes like ours from popping into existence. Of these universes, only the ones which are stable survive, and of these stable universes, only the ones that can support complex intelligent life give rise to the question of their own existence.

>>

>>7654918

>le fancy re-statement of le weak anthropic principle xD

The first sentence is a novel addition however.

>>

>>7654778

Because if it didn't, we wouldn't be here to talk about it. If we're here, it had to be this "combination"

Can someone explain to me what genetics tell us about Europeans and especially Germanic people? I'm not a stormfag by the way

21 Replies / 4 Images
View Thread

>>

That they are a unique genetic clustering that should be preserved and protected rather than thrown onto the alter of globalism to satisfy some transient neo-Marxist political wetdream.

>>

It tells us Indo-european speakers came to Europe from the mountains of the middle east as picrelated is the distribution of the R1b which is ancestral to all western European R1b.

>>

>>7654782

Is there anything mentionable about people with green eyes? ie, people from around the eurasian mountainous area?

Is Uploading your consciousness to a computre like in Chappie possible?

17 Replies / 4 Images
View Thread

>>

Great thread.

>>

>>7654690

You can't represent the whole of Japanese art with the Edo period alone. Least that's probably when it's from without bothering to look it up.

>>

>>7654690

>The Japanese guy has an X-Men badge.

>He is a mutant.

>That is actually how he looked in real life.

Why can't kekstructivists construct the largest prime number?

32 Replies / 3 Images
View Thread

>>

>>7654422

holy fuck did it change my kek to kek??

>>

>>7654424

wordfilters, faggot. now get where you belong:

>>>/trash/

Anonymous

Not your average biology question 2015-11-12 04:23:41 Post No.7654325

[Report] Image search: [iqdb] [SauceNao] [Google]

Not your average biology question 2015-11-12 04:23:41 Post No.7654325

[Report] Image search: [iqdb] [SauceNao] [Google]

Not your average biology question
Anonymous
2015-11-12 04:23:41
Post No. 7654325
[Report]
[View thread]

I've got a question for all you biologists out there. So I had a little thought experiment about the combination of species, namely humans and snakes.

So here's the question.

This supposed combination species of human and snake, in your opinion would it give birth, or lay eggs?

12 Replies / 1 Images
View Thread

>>

>>

The lamia from FFXI were magical experiments and did not in fact have the ability to reproduce.

Neither

>>

>>7654325

I think it will be giving birth, why? idk I can say anything, maybe because, if that happen, the "living thing" will be big, and is often seen that great species don't lay eggs

Howdy /sci/, first time poster

Working on something for work (in my own time as a bit of a project) and I'm stuck with an equation I need to reverse for working out wages.

The formulas we're provided with will calculate tax on a gross amount, which is withheld and the employees get paid the net amount after tax. I want to work it backwards.

We're given the following formula

>y=ax-b

>Where y=tax

>a=gross

>x= Coefficient x

>b= Coefficient b

>n= net

I'm bloody hopeless at math and even worse with algebra so the closest I've come is

>n=g-(gx-b)

But stuffed if I know how to solve it.

Pic is my silly table.

11 Replies / 4 Images
View Thread

>>

Bump

>>

>>7654230

Question is not clear. You're given

Gross = Net - Tax

Tax = Gross * X - B

And you want to solve for what as a function of what?

>>

>>7654253

In a real situation, we are only given the Net amount.

Given that I know what X and B are for that particular figure, I want to be able to figure out the tax on Net.

What happens when we run out of oil?

36 Replies / 3 Images
View Thread

>>

>>7654191

Trump makes Mexico buy us more.

>>

>>7654191

WW3

>>

Social and economic chaos will ensure

We're too heavily dependent on it that a switch to alternative sources for fuel will take decades to happen

Anonymous

Statistics in Number Theory 2015-11-12 03:07:39 Post No.7654155

[Report] Image search: [iqdb] [SauceNao] [Google]

Statistics in Number Theory 2015-11-12 03:07:39 Post No.7654155

[Report] Image search: [iqdb] [SauceNao] [Google]

Hi,

I was hoping someone could explain an idea I heard of before but never fully formalized. Basically, it was a philosophy for why the error terms in prime counting functions (in number fields, function fields, and some other places in number theory) "should" have exponent 1/2, (almost) as predicted by the Riemann hypothesis and its variants.

Here's a vague idea of what I have, if it helps prompt someone to properly explain/give a reference. The keyword is the Central Limit Theorem, which states (I believe...) that if [math]X_i[/math] are a collection...

Comment too long. Click here to view the full text.

23 Replies / 1 Images
View Thread

>>

>>7654155

Let me try CLT again:

[eqn] \frac{X_1 + ... + X_n}{\sqrt{n}} \to N(0,\sigma).[/eqn]

>>

>>7654155

Just for completeness, in case a statistician shows up that is unfamiliar with the number theory: the Mobius function [math]\mu(n)[/math] takes value either [math]-1, 0, 1[/math] depending on the prime factors of n so that it is 0 when n is divisible by a square, -1 when divisible by an odd number of distinct primes, and 1 otherwise. So if there's no bias in number to have even or odd prime number of divisors, the mean of [math]\mu(n) = \lim_{x \to \infty} \frac{1}{x} \sum_{n \le x} \mu(n) [/math] should be 0,...

Comment too long. Click here to view the full text.

>>

>>7654167

One more post, sorry.

It is a theorem (equivalent to the famous Prime Number Theorem!) that

[eqn] M(\mu) = \lim_{x \to \infty} \frac{1}{x} \sum_{n \le x} \mu(n) = 0[/eqn]

and the Riemann hypothesis is that we have the estimate

[eqn] \frac{1}{x} \sum_{n \le x} \mu(n) = O(x^{1/2+\varepsilon}).[/eqn]

That should make more sense.

I have two months until university starts. How do I learn the harder algebra and pre-calculus so that I can test into Calculus?

What books, to be specific? I have a $110 card to Half Price Books and need to spend it anyway as there is no HPB where my university is and it will be worthless once I go.

21 Replies / 1 Images
View Thread

>>

>harder algebra

>pre-calculus

>>

>>7654104

Just stare at a unit circle for 2 months straight, thats how I did it.

>>

if ur any good the test should be ez

Anonymous

stupid question, please answer 2015-11-12 01:11:21 Post No.7653921

[Report] Image search: [iqdb] [SauceNao] [Google]

stupid question, please answer 2015-11-12 01:11:21 Post No.7653921

[Report] Image search: [iqdb] [SauceNao] [Google]

stupid question, please answer
Anonymous
2015-11-12 01:11:21
Post No. 7653921
[Report]
[View thread]

Gallium metal has a melting point of about 30 degrees C.

Galinstan metal has a melting point of about -19 degrees C.

If I melted these two metals and mixed them, would they bond into a metal with the melting point of about 5.5 degrees C?

I mean just by allowing them to melt and mixing them in a container. And not adding any extra heat above 30 degrees.

18 Replies / 2 Images
View Thread

>>

Bump for answer

>>

>>7653921

It can have different melting points depending on how the crystal structure of the alloy is.

>>

>>7653921

Silly you, Galinstan is an alloy of Gallium and some other stuff.

Anonymous

Calculus Textbooks 2015-11-12 01:05:50 Post No.7653912

[Report] Image search: [iqdb] [SauceNao] [Google]

Calculus Textbooks 2015-11-12 01:05:50 Post No.7653912

[Report] Image search: [iqdb] [SauceNao] [Google]

File: 31avrrpB%2BSL._SY344_BO1,204,203,200_.jpg (8 KB, 229x346)
Image search:
[iqdb]
[SauceNao]
[Google]

8 KB,

Enough endless bickering and let's compile a list of good calculus books at various levels to point people to.

311 Replies / 24 Images
View Thread

>>

>>7653912

>>Single Variable Calculus

>Weak Students

"Calculus Made Easy" by Silvanus Thompson and Martin Gardner

"Calculus: An Intuitive and Physical Approach" (Dover) by Morris Kline

"Elementary Calculus: An Infinitesimal Approach" by Jerome Keisler (Uses infinitesimals)

"A First Course in Calculus" by Serge Lang

>Strong Students

"Calculus" by Spivak (Good mathematical...

Comment too long. Click here to view the full text.

>>

>>7653917

Is infinitesimals good or bad? What are the benefits/ disadvantages? I've only taken 1 semester of calc back in high school (dropped cause I did poorly.)

>>

>>7653917

>>Analysis

>Single Variable (with Metric Spaces)

"Real Mathematical Analysis" by Pugh (weaker version of Rudin)

"Principles of Mathematical Analysis" by Rudin

"Mathematical Analysis" by Apostol

"Mathematical Analysis I & II" by Zorich

>Multivariable Analysis

"Functions of Several Variables" by Fleming

"Analysis on Manifolds" by Munkres

"Calculus...

Comment too long. Click here to view the full text.

On a scale from 1 to 10, how much does weed cure cancer?

18 Replies / 1 Images
View Thread

>>

it doesn't cure cancer you dumbfuck it just alleviates some of the pain caused by cancer symptoms.

>>

>>7653905

Look up some of the literature on the cannabinoid system's relationship with immune system modulation.

Anonymous

Mass Consciousness anyone? 2015-11-12 00:58:10 Post No.7653890

[Report] Image search: [iqdb] [SauceNao] [Google]

Mass Consciousness anyone? 2015-11-12 00:58:10 Post No.7653890

[Report] Image search: [iqdb] [SauceNao] [Google]

Ideas, experiences, questions, knowledge, etc?

35 Replies / 6 Images
View Thread

>>

Coming from the round earther

>>

Use complete sentences and maybe I'll give you an actual reply.

>>

>>7653890

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

Hey /sci

I fucked up

I'm pretty good at learning things

I am number one in my Math and Physics class almost number one in History

I just started to get my shit together

Got caught up and ahead in my classes reading the textbook's in about 3 weeks

But I ran into a problem In engineering class. I haven't paid attention until now and there is no textbook for this shit

I'm looking for any anons who know anything about breadboards, "and gates", "Or gates", "Inverter gates", Multisim, "oscillator".....(Multisim...

Comment too long. Click here to view the full text.

12 Replies / 1 Images
View Thread

>>

>I'm pretty good at learning things

stopped reading there

>>

>>7653886

Grades don't matter. Sorry to burst your bubble. What matters is that you learn problem solving skills. Trying to figure it out yourself, even without information is a noble pursuit. When you get into the real world and are asked to create something completely new and novel, you can't just ask someone how to do it. You have to think for yourself.

Also, that's a shitty class if it doesn't have readings or notes. Maybe check the class facebook page. In all my classes we had a shared...

Comment too long. Click here to view the full text.

>>

You clearly aren't good at learning things if you can't even figure out a fucking And gate.

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 them. If you need IP information for a Poster - you need to contact them. This website shows only archived content.

If a post contains personal/copyrighted/illegal content you can contact me at wtabusse@gmail.com with that post and thread number and it will be removed as soon as possible.