Archived threads in /sci/ - Science & Math - 419. page
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Best analysis
Pic related
Otherwise General Sci book thread
>>7792822
is this book good for learning proofs??
>>7793027
This one is, and it's free.
Why every ancient creatures were so huge??
because of oxygen?
>>7782955
I recommend you Go /sci/
The Blue Whale is the biggest animal ever and it's alive
>>7782955
maybe
crocs are coldblooded too and can live without any food FOR A YEAR because of it
How does one into Real Anaylsis?
This is my first semester of taking this course and I literally have no idea what is going on. I excelled in all of my Calc classes as well as Linear algebra but from being in Real Analysis for a week its like learning a different language.
Is real analysis supposed to be extremely difficult right off the bat? Does it get easier?
Does anybody have any tips?
>>7800264
My advice: Don't be a brainlet. If that pic was too hard for you, you might be wrong in math. Every frashman should see this as trivial.
>>7800264
It's hard at first since it's likely you've never seen something like it before. It would probably be the first time you encounter the true rigour of mathematics.
But it gets easier once you get the hang of it
>>7800264
Learn other math and up your mathematical maturity level
LVL required
1: Calculus, Matrix Algebra, ODEs
2: Proofs, Set Theory, Combinatorics, Graph Theory, Probability, Modern Geometry
3: Mathematical Logic, Vector Space Theory, Complex Variables, Elementary Differential Geometry
4: Topology, Baby Rudin, Abstract Algebra, PDEs
5: Stein and Shakarchi
6: Papa Rudin
Why learn Physics(Science)?
Why learn Math?
>>7800028
That's pretty good actually. Where is that from?
>>7800028
nah m8 /sci/ is about smoking w33d and looking at da stars m8.
>>7800028
>Why learn Physics(Science)?
To understand the world
>Why learn Math?
To understand the mind of God
What's a cooler field? Algebraic Topology or Differential Geometry?
>>7799882
I prefer algebraic geometry and differential topology.
>>7799887
Algebraic Geometry scares me, seems like it's predominately related to ring theory, which I wasn't a fan of, Algebraic Topology is predominately homological algebra which is a cool as fuck field.
>>7799892
Rings are dual to affine schemes, so ring theory and algebraic geometry are basically the same thing. It's interesting though, because you can reinterpret properties of rings as geometric properties. For instance, product rings are the same thing as disconnected spaces.
>passed calculus on several occasions
>still no idea what i'm doing
how to *understand* it without ching chong rote methods
>>7799550
Take Real Analysis.
>>7799553
This and only this. I can't understand how the fuck is it even possible that in burgerland people don't take Real Anal in their first semester like in Europe.
How the fucking fuck is this shit possible.
>>7799566
People in America are expected to learn practical skills first so they don't end up as lazy impoverished Italians.
Since quantum mechanics say that all interactions in the universe are indeterminable and random, does that mean it's possible for me to win a qt by saying anything and the electrons in her mind fuck up?
No.
What you SHOULD do is buy alcohol and learn how to dance.
>>7799148
>Since quantum mechanics say that all interactions in the universe are indeterminable and random
No
>>7799153
Yes, you're wrong
What's the best way to get practice reading other people's code and to get the most from it? Any particular code bases that are best suited for the task, i.e. that are well written, so as to internalize best practices, and with enough documentation that I'd be able to get going at a decent pace?
read a million lines a day and you'll be an expert real quick
>>7798117
>what's the best way
you code, then code something else, then come back and read your first code a week later
rinse and repeat
>>7798117
>What's the best way to get practice reading other people's code
By doing it. Everyone has different styles of writing and the more you read the more you will be able to understand.
Is there anything besides photons that travels at the speed of light?
>>7798110
neutrinos
gravity waves
propagation
entropy
Literally everything relative to the universe is traveling the speed of light.
>be NASA
>only been to the Moon once... 40 years ago
>most people still think moon landings were fake to this day
>be Elon
>wants to go to Mars and terraform it
>suddenly there are actually millions of people right now who believe Elon can pull it off
> be a shitposter
> shitpost
>>7795467
>Has lots of money
>Has hired probably the best talent in the field, next only to NASA and even that is debatable
>Is actually doing shit with the money and engineers he has, and well documenting all of it to increase support for his company both from the public and investors.
I think that he won't be able to do it in his life time but one day we will get there, it is obvious.
Btw, there is no majority who think the moon landing was faked. The only people are the 3 guys who browse /x/ and their friends.
>>7795470
Statistically (based off the average 2015 US life expectancy) he has until about 2052 to get to Mars. With life-extending treatments that he'd easily be able to afford / get in line early for, I think he's definitely going to get his wish of dying on Mars. Terraforming obviously won't be achieved this century.
Y'all got any recommendations for a decent telescope I could get for less than $350? Either reflector or refractor would be fine, I'm hoping to view planets, galaxies, and nebulae.
> I'm hoping to view galaxies, and nebulae
lel
>>7792845
interested; bump
>>7792845
If you want to view fainter objects like galaxies and nebulae then I would recommend a reflector. More optics for the money. I'll find something for you.
What is the explanation for space being infinite? It's said to go on forever, but if it goes on forever, that means it never stops, meaning there are infinite solar systems like our own. Then again if we were to say it stops at one point, what happens? Is it like an invisible wall that you just "hit"?
My personal theory is that there is an end, but it's not so much an end as it is an endless loop. Let's say, for example, you exit the galaxy from the "top". You just come in through the bottom. Pic related.
>>7790372
Impossibru.
>>7790372
the "end" of the universe is the furthest point light (or matter if you want to make that the boundary) has reached since the universe began.
>>7790372
>exit though the top
>come in through the bottom
>OP's theory confirms faster than light travel
>General and Special Relativity completely debunked
>Back to classical mechanics with us. I always knew Newton was correct and Einstein was just a faggot
![stem_logo_by_officialweffe-d6u6f0u[1].jpg](https://i.imgur.com/nSrw3bB.jpg "stem_logo_by_officialweffe-d6u6f0u[1].jpg")
How i can learn a little about control theory before my semester starts? Should i grab a textbook and start working on examples or should i read it first? I almost never use textbooks when i am studying, i go over my notes and when i get stuck i ask a friend for help and it always worked.
If a star was instantly split in two down the middle and the two parts was moved a kilometer away from each other, what would happen?
>falls back together like nothing happens
>a lot of core mass escapes
>falls back together in a big fart
>or it goes nova instantly
One kilometer is nothing in star size but I thought the idea was interesting.
why do you ask question that never going to happen
>>7799665
sorry mum
This is actually interesting
Can we use summation methods to get a value when limits converges to 0?
an example would be
[eqn] \prod_{p=0}^{\infty} e^{-p} = \sqrt[12]{e} [/eqn]
instead of just 0, this shows you how big the zero is.
