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Archived threads in /sci/ - Science & Math - 152. page
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>>8334397
Just induct it, bro.
>>
>>8334397
This is really obvious. If there are more than 0 ways of choosing a sequence of positive integers n_k, then there is a maximum positive integer n_M. Clearly, any k length sequences that feature positive integers greater than n_M will not satisfy the equation, as every reciprocal generated by the new sequence is less than every reciprocal generated by the n_k sequence. Now that we have proved that we can only choose k positive integers between 1 and n_M, there are clearly only finitely many choices we can make, therefore,...
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>>8334440
*that only include integers greater than n_M

Are the women's Olympic events are basically just a branch of the Paralympics for people that lack a Y chromosome?
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>>8334385
Maybe.
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>>8334467
extra chromosome
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>>8334470
witnessed

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if a coin is tossed in a forest and no one is around to see it, is it still 50/50?
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>>8334380
huh really makes you think
>>
how can the trees be real if the wind isn't real?
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>>8334380

gtfo

sage

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>>
>>8334338
shitposting on 4chan
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>>8334341
they don't have 4chan in russia
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Living in a depressing Russian apartment, probably solving the Riemann hypothesis that he publish posthumously because he hated all the attention he got from the Poincare proof.

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>yeah bro just learn COBOL and FORTRAN all those old timers are retiring and there is a massive demand for legacy programmers they can make \$150k a year easily

am I being memed?
>>
ya
noone use them
>>
>>8334334
>know enough C to implement an assembler/interpreter for a noncomplete ISA
Is FORTRAN really that bad or will it be more of the same?
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>>8334700
CFD and FEA is done in FORTRAN

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Everyone always asks for people's opinions on who they think is the greatest of mathematics,physics

but i never see Chemistry..So I ask who is the greatest chemist of the 20th century in your opinion?
>>
heck
>>
Fritz Haber
>Haber-Bosch process makes ammonia production ez
>industrial production of firtilizer causes population to skyrocket
>realizes people suck and becomes the father of chemical warfare
>>
probably Linus Pauling

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So i have to take an introductory programming course, and I don't know any programming languages.

The course uses python, how relatable is it to lua or C#?
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it's an introductory course, you're not supposed to know any.
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>>8334296
python is xkcd-tier plebbit meme language for hipster physicists but it works

It has exactly one thing going for it: it's not perl.

C# is also a meme language but it is a language business-types know about so it gets used.

Programming with nearly any language developed since 1974 will be fine. No significant progress has been made in making better languages since scheme, just lots of little things.
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>>8334296
How about you just fucking learn any language first. Just make sure you don't learn some shitty one like VB or COBOL. Every language in that list is fine. They mostly differ in how they are implemented (interpreted vs compiled etc). If you want a job then you should know multiple programming languages anyway (javascript effectively mandatory because browsers are everywhere).

wtf is this? Math theory in pre-cal?

Question 1 (Answer before watching the video)

1. Contemplate on the word infinity. Think about what it represents. Now answer this question: do you think there are different sizes of infinity? Share your reasoning.

Questions 2 - 4 (Answer after watching the video).

2. Give a 1- 2 sentence summary on Georg Cantor and his accomplishments.

3. Use your own words to define the terms "one-to-one", "rational", and "irrational".

4....
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homework goes in >>>/hm/
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OP here. I think infinity is infinite because that is just the way it is and why it exist. There are not multiple sizes of infinity just like there is only one GOD. Honestly, I'm not even sure if infinity exist. It could just be a made up concept. GOD on the other hand is not. I know for sure imaginary numbers are crap because they are imaginary. They wouldn't call them that otherwise. OP out. Just wanted some opinions.
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>>8334272
That wasn't even funny. I'm not gay.

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>"If you're so smart, /sci/, why aren't you gold at an I(X)O?"
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>>8334251
>If you're so smart, woman, why do you have a X chromosome?
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>>8334761
Holy shit you're bad at basic biology
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>>8334761
fyi men have a x chromosome too

Hi /sci/, brainlet here. Can you explain to me why i^i is a real number?

https://www.math.hmc.edu/funfacts/ffiles/20013.3.shtml
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>>8334236
What part do you not understand?
They just use the Euler's formula and substitute x by pi/2 and then raise both sides by i.
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>>8334236
The problem lies within the question: How do you even define exponentiation of a general complex number? In the reals, you can easily define
$a^b := \exp(b \cdot \log(a))$ for positive $a$ and arbitrary $b$. The definition for general complex $a$ is a little involved, because the logarithm isn't uniquely defined if we allow complex numbers.
To see this in more detail, consider the basic example
$\exp(0) = 1 = \exp(2 \pi i)$. We usually define [math]\log(1)...
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>>8334265
wrong
>>>/b/

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if we human were wired better for logical thinking, a smarter race so to say, would we be happier or off worse? discuss
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>>8334201
>if we human were wired better for logical thinking, a smarter race so to say, would we be happier or off worse? discuss

Intelligence in the general population is bad for buisiness.
>>
we are wired for logical thinking, people just lack the motivation to apply it
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>>8334201
There are plenty of smart people that do awful things. We need more morality, not more intelligence.

Why did this article trigger /sci/ so much the last time it was posted?

>https://aeon.co/essays/your-brain-does-not-process-information-and-it-is-not-a-computer

We should stop comparing the human brain with the current technological breakthroughs. The model could help explain some parts of human intelligence but in the end it will always fail, for it's way too simplistic.

And worse of all it will probably lead to some shitty sci-fi novels.
>>
The article is wrong in all possible ways.

The brain does store and retrieve memories.
It moves information around for processing and storage. Memories are processed and transformed before they're stored.

And you can find Beethoven’s 5th Symphony in the brain of some people, certainly including Beethoven.

The article is written by a psychologist that had his feelings hurt when the human psyche moved from some abstract concept to a more concrete model.
I'm sorry that he doesn't like it, but this is the reality.
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>>8334199
>The model could help explain some parts of human intelligence but in the end it will always fail, for it's way too simplistic.

It's actually abstract enough to work.
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Not a peer-reviewed scientific journal?
Into the trash.
Why is /sci/ so fulled of /x/ and /pol/ these days?
At least when /his/ was here they avoided using fallacies.

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So far our efforts have been focused on the general projective plane. While this has done us well so far, there are reasons we may want to change our focus, if only for a while.

Firstly, recall we based our axioms on observations of the Euclidean plane. Furthermore, the real projective plane is basically the Euclidean plane with a line at infinity. However, the Euclidean plane is just the two dimensional version of Euclidean geometry. So far, we haven't found a way to generalize projective planes in the same way, and it would be interesting to find out how, if possible.

Secondly,...
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Section 0(>>8266952) text: http://pastebin.com/50w9MYjD
Section 1 text(>>8282778): http://pastebin.com/fMdRzhTf
Section 2 text(>>8317513): http://pastebin.com/GfdvBDML

Definitions and notations: https://www.dropbox.com/s/ia4m7s0fy59z9jv
Axioms, Theorems, and other statements: https://www.dropbox.com/s/6ch0btu3adiz2ob
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>muh axioms
into the trash
>>
In Euclidean space dimensions 3 and higher, there are three relevant cases for two distinct lines:

-intersecting
-parallel
-skew(non-coplanar)

Axiom 3 doesn't have to deal with the skew case, so our task is to show how to correctly treat the skew case projectively. Recall that one of the arguments for the line at 'infinity' was continuity. If you 'nudge' a pair of parallel lines so they aren't skew, then they intersect at a point 'far away', which justifies the idea that they intersect 'at infinity'. On the...

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So what happens if a scientist (let's say a faculty member at a university) suddenly has a brilliant idea, for example a possible solution to a Big Problem in his field and an experiment to test it, but doing so is not among the objectives of any of his current grants?

Does he write a grant proposal at that point? That sounds like a huge delay which would make it very likely someone else will publish the same thing first.

Do academics have faster means of securing smaller amounts of funding for such things?
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>>8334131
No, your idea dies with you because nobody will believe and/or fund you, unless you're very lucky.
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>>8334143
Simple and true.

Unless you manage to acquire a freak grant that allows you to do whatever the fuck you want (e.g. Bill Gates believing in your 'vision'), you ALWAYS word your grant in such a way that you maximise the chances of success. This means that the funding call is already limiting what you can or can not do. Sure, there's always a bit of wiggle-room and most scientists like to invest a tiny portion of their money into their pet projects, but other than that - progress in tiny steps.
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>>8334131
Your ideas are actually shitty, you just haven't thought about them enough.

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are trees vegetables?
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>>8334080
Look it up, then swallow some rat poison.
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>>8334080
I think you're a vegetable anon
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>>8334080
somebody's never eaten bark before

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Is it worth getting a bachelor's degree in or should I switch my major before its too late
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>>8333971
Gonna guess, you entered physics because of the money

Just switch to whatever you like, dumb frogposter
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>>8333982
Why would he enter physics for money? If he wanted money he would enter something like petroleum engineering.
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>>8333982
I chose to enter physics because I like it

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>mfw my forum built from scratch works

Hey /sci/, /b/fag here.

I could use some testers. No need to filter yourselves, go all out.

http://dmanufacture.com/d-general.php

Only requirement is a pic + name.
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Cant register bruh
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>>8333833

Post pic for reason? I put rules but theres a chance I fucked it up.
>>
The username must be >=6 characters, right?

HOW ABOUT YOU WRITE THAT BELOW THE REGISTRATION FORM?

Also, this is /sci/, not /g/

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What do you think about pandering to funding bodies?

for instance, your research proposal is highly likely to be funded if it involves something cute, endangered, economically/ecologically important, or involves climate change.

Is it disingenuous to purposely try to include one or more of these things in your subject matter ?

I think its a fucking necessity; funding doesn't just pop out of nowhere, and the idea that a government or enterprise is going to fund you to research something because you think its cool or feel emotionally attached to it is...
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>>8333754
I have very good concept about research in my field but i have no idea who to talk to since everything is about knowing the right people which I dont.
I dont even know who to pander to lmao
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>>8333758

Assuming you have graduated you should know how this works.

When I say pandering I'm talking about institutions, not individual people.

Do you not understand how funding works in STEM
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>>8333766
>Do you not understand how funding works in STEM
No not really.
I know im retarded

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I 'm in the middle of a funeral, I want to say something about death , I advise something fast to read?
>>
read that one monologue from Hamlet
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Who the fuck checks 4chan during a funeral?
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>>8333751

What the fuck did you just fucking say about me, you little bitch? I’ll have you know I graduated top of my class in the Navy Seals, and I’ve been involved in numerous secret raids on Al-Quaeda, and I have over 300 confirmed kills. I am trained in gorilla warfare and I’m the top sniper in the entire US armed forces. You are nothing to me but just another target. I will wipe you the fuck out with precision the likes of which has never been seen before on this Earth, mark my fucking words. You think you can...

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I almost failed highschool math and the teacher told me I would never amount to anything. I have holes in my foundation but I have been practicing for a couple months since I would like to go into math at uni. Any advice? How can I go from full retard in math to 4.0 math major?
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>>8333698
Hard work, passion, it may not be enough for 4.0 but with 4/5 hours of work a day it will get better every day
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>>8333701
I've currently been doing pic related. I haven't seen drastic improvement I usually glide through questions no problem but get stuck for hours on one due to holes in my math foundation. I want to know how to fill in these holes but I don't know what I don't konw
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>>8333698

old highschool maths teacher told me i'd never amount to anything

now i'm starting my post-grad thesis, and that bitch is fuckin' dead

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Is this possible /sci/?

>water of the reservoir generates electricity
>the water at the bottom evaporates
>it has to ascend a tunnel because there is for example a glas roof on the water.
>it condensates in the cool mountain and flows again in the reservoir.
>>
Sure. You could get a few drops back into the reservoir by the time it empties completely.
>>
>>8333588
Weeell... This is basically how the atmosphere works, so...
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>>8333599
I assume he meant an isolated system. A reservoir that doesn't refill from groundwater.

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>be me
>compsci brainlet
>have a grafix course
>naturally we get some linear algebra
>time to git gud
>endterm has basic questions like
>calculate the determinant of this simple 3x2 matrix

It felt really weird answering these questions. On one hand, it's ez points, on the other hand...
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>>8333574
>determinant of 3x2 matrix

Sounds like you failed.
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>>8333580
oops was looking at the wrong matrix/question
>>
>>8333580

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>>
>>8333535
Yes.
Understand the unit circle and you can quickly find back any trig formula you need.
>>
Say it loud

SOH CAH TOA

Sintheta =Opposite /Hypotenuse

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>>8333547
>>8333551
Great shit anon's, thank you!

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@ashwin7002:
>there are some videos on YouTube claiming something hit the rocket. Any reality there?
@elonmusk:
>We have not ruled that out.

Where were you when /sci/ got BTFO?
Conspiratards could be right for once.
>>
>>8333527
>>>/pol/
>>
In Israel, some informed sources suggest that the reason for the destruction is far from technical and may never come to light. For the Lord has given the command, and he will smash the great house into pieces and the small house into bits. (Amos-6-11) They cite the only previous SpaceX failure, which occurred in June, 2015, when a Falcon 9 rocket carrying supplies to the International Space Station exploded just a few minutes after launch. The company set up an inquiry team composed of 11 staff members which never released details of its findings.

Comment too long.
>>
>>8333527
This was my first thought when I heard about it.
Just saying, but there's a lot of people happy about SpaceX being grounded.

Hi sci is my first time I post here.
It is possible that there's another hominid slaving us? If not how is possible that a species averaging 150 in IQ became extinct? Does not make sense to me.
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>>8333371
>Does not make sense to me.
Fortunately it doesn't make sense to any paleontologist either.
>>
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>>8333371
They cucked themselves by becoming pessimistic nihilists, ultimately deciding their fate as a forgotten species that would die out quickly due to lack of motivation and social skills. They believed their analytically oriented brains would carry them to salvation.The last living member was on his deathbed when he decided he needed to keep this legacy alive in some way. With his last dying breaths, he typed away furiously. As he slid into unconciousness, he hit the "enter" button on his Linux, and created a...
>>
>>8333371
They've built pyramids and other shit.
Discovered speeds higher than speed of light.

Left this shit planet

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How do they send images to the Earth? Did they discover WiFi on Mars?
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>>8333355
How're you this dumb?
>>
>>8333355
NASA has a super amazing WiFi on Earth that can reach Mars. They only get 1 bar out there though so it takes forever to transmit stuff back.
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>>8333380
Yea basically, sometimes if they want many pictures at once they send ISS to orbit Mars for a while and come back with the photos.

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If the ISS has some kind of retrothrusters and was able to slow it down to the point where it was stationary to the ground it's above, would it fall straight down?
>>
>>8333354
yes
>>
>>8333359
It's in space you fucking retard, there's no gravity to make it fall
>>
>>8333362

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Why is this guy a meme?
>>
>>8332960
Seriously? You know what, j-just, here.
https://en.wikipedia.org/wiki/Shinichi_Mochizuki
>He is the author of inter-universal Teichmüller theory
>>
>>8332977
I'm new to this board. Is that his version of a "theory of everything"?
>>
thats a big theory

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Is it possible to move an object from rest at point A to rest at point B without any energy consumption?

Assume no friction, elastic losses, air drag resistance losses or otherwise. Rest is defined as static equilibrium. A pendulum at max height is not in static equilibrium
>>
>>8332665
What do you mean energy consumption? If you're moving an object with mass, it will have energy.
If you mean moving an object without losing energy, look at situations where you convert gravitational potential energy to kinetic energy.
>>
>>8332665
>Is it possible to accelerate an object without energy being "consumed"?
No.
>>
>>8332665
No

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>People really think there isn't a center of the universe.
Are these the same people who believe the world is flat?
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>>8332566
Point in its direction then
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>>8332566
So how do you know that the universe's topology even allows for there to be a "center"? What if it's topologically closed so it loops back in on itself? In other words if you keep heading in one direction long enough you'll end up back where you started.
>>
>>8332579
Observe an explosion in a vacuum.

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