/sci/ - Science & Math

>>12699464

>>12699470

>>12699464

>>12699464
bump

>>12699476
Wtf how do you know

>>12699464

>>12699585
Best abstract ever.

>>12699476
for real though, got any pdfs?

>>12701350
>>12699476

for real, not even joking

>>12701413
>300/8
Legit big brain take.

>>12701413
Under that innocent smile lies the heart of a devil

>>12701467
[math]5\pi/2[/math]

>>12701435
This isn't trolling though, pi is a lie and should be four. Makes math a lot easier to do by hand.

>>12701359
holy shit who the hell approximates pi and e to 3

the most i approximate is 3.1415 for pi and 2.79 for e

>>12701361
Did he really ever post here or is this some cunt larping?

>>12701191
I had a dream about paleobotany last night

>>12701585
does it matter?

>>12699521
>but copy of (you) isn't real (you)

>>12701585
That wasn't him, but I am personally certain that Montano posted here. He subscribed to my YouTube channel right after I posted a link to one of my videos.

>>12699470
Based Wittgenstein

>>12701747
>Montano
Who?

>>12699470
Is Francis Skinner a math problem?

>>12699585
Damn, my sides shot out of the solar system at superluminal speed.

>>12701536
>holy shit who the hell approximates pi and e to 3
The state legislature of Indiana tried that with pi once but there happened to be a mathematician visiting that day who was able to tell them they're morons and should leave the definition of pi alone.

>>12701501
wouldn't YOU still fall out?

>>12705121
You have to swim up.

>>12704810
Meanwhile in Alabama

>>12701191
As someone in the field of invertebrate paleontology, this is exactly how it is.

>>12705121
Only 30% of us because the other 70% is made of water

>>12705657
Based & kek’d

>>12705204
Good point. Only 30% of you would have to swim up.

>>12701435
>tfw you realize all circles you see on screens are made from pixels, and really do have perimeter 4 times their diameter if you look closely enough.

>>12701536
If you can't remember 3.14159265, just use 22/7.

>>12704862
Im sure they did, reddit. Im sur they did

>>12701191
>paleobotany
>not dendrochronology
not gonna make it

>>12705121
oil

>>12702013
Here are some points in which you are retarded.
1. The natural numbers are not infinite, that's absurd. They're very finite. The collection of all possible natural numbers, however, is not finite, i.e. infinite.
2. Cantor was wrong about many things, for example the definiteness of the continuum problem as well as his naive definition of a set which brought about a miriad of contradiction.
3. Finitists don't believe the largest natural number exists. That's absurd. You can always add 1. Just because you don't think "the set of all natural numbers" is a valid mathematical object which you can manipulate to your fancies doesn't mean you don't understand the potential infinite.
4. Infinity DOES NOT exist in any empirical form. When we talk about infinity we don't have any referrent besides the abstract ideal image in our heads, whereas when we talk about finite things we can easily construct referrents using computers and algorithms, so that our claims become falsifiable and related to reality. Claims about infinity are NOT about anything empirical.

>>12705657
Landau is so bad at basic reasoning I couldn't get past the beginning chapters of book 1. Dude should have taken a course in basic proofs.

>>12706482
I don't get this joke

>>12699464
Kurt Gödel walks into a bar. He sits down on a stool, looks at the bartender and says "I can't tell this joke because I'm in it"

>>12699470
Then what happened?

>>12701367

>>12701536
>>the most i approximate is 3.1415 for pi and 2.79 for e
the joke is that you're smart for doing this
you dont even know what you gain by trying to be less imprecise.

>>12702368
so damn true

>>12707958
>peer-reviewed
>journal
aka all that boring worthless crap that gets past the political filters, the status quo. The internet circumvents such barriers to publication, so most of that stuff today is just a boring waste of everyone's time.

>>12706590
You should have reread it a couple more times then, I was able to make it through even without knowing any calculus of variations or really any physics when first going through. Sometimes you just need to stare at it for a while and try to see why something is justified, just note that sometimes not all assumptions are explicitly stated (as is common in physics books)

>>12707958
>peer review

>>12699464
that pic is not science humour/memes, it is just a product placement/brand awareness advertisement.

>>12708177
soul
>>12708191
soulless

>>12708262
Why?

>>12708275
a/100*b=b/100*a

>>12708275
multiplication is commutative

>>12708580
I agree, multiplication is comfusative

>>12707657
He came.

>>12708580
Why?

>>12707653
Nice. Mind if I tell this on my Facebook page? I’ll give you credit of course. Thanks in advance for your reply.

>>12706582
Theology.

>>12701728

>>12708186
Do you have the book with you?
So, according to Landau, since two functions which differ by total derivative give the same equations, the only way in which the equations could be the same is if the functions differ by a total time derivartive.
In essence, Landau is asserting here that if P=>Q then Q=>P.

Is he retarded???

>>12701151
Top kek

>>12708191
go to vixra if you want to see what peer review prevents

>>12709007
>what is calculus of variations
He’s varying the action S so the two stationary points f2 & f1 don’t contribute anything.

>>12709720
You can't be fucking serious. Of course I know that, you're making the same fucking mistake as Landau. Just because adding a time derivative doesn't change the equations, that doesn't mean that the only way you could get the same equations is if you add a time derivative. This is faulty logic. You should supply a separate proof for why the only way the equations can be the same is if the lagrangians differ by a time derivative.

>>12709789
Part of the assumption is that the laws of physics are the same for all observers. If you add anything to the Lagrangian that isn’t a time derivative of some function, then integrating in time and varying the result will give you some nonzero addition to your Lagrangian. That amounts to some additional energy in one frame that isn’t seen in the other.

>>12709880
>If you add anything to the Lagrangian that isn’t a time derivative of some function, then integrating in time and varying the result will give you some nonzero addition to your Lagrangian
Prove it.

>>12709923
It’s in the second line of the section 2 excerpt you posted. How do you intend to make those points stationary if you can’t turn the integral over time into one which produces stationary endpoints?

>>12710013
>It’s in the second line of the section 2 excerpt you posted.
It's not. That's a proof of a completely different proposition.
>How do you intend to make those points stationary if you can’t turn the integral over time into one which produces stationary endpoints?
Explain what you mean in precise mathematical terms to produce a proof. Just saying "how can you expect it to be false" does not constitute a proof that it's true.
Do you really fail to see how Landau here committed a most elementary logical error?

>>12710128
>expecting a physics textbook to have the same strict logical rigour as a math textbook
User error on your part friend. This will get you started on the strict proof you seek.

>>12702013

>>12710388
Still not a proof.

>>12702013
Show me an infinite natural number.

>>12710438
You’re right it’s not. Go do some work yourself brainlet, stop looking for mental handouts. I bet you get mad when the barista at Starbucks forgets the whipped cream on your onions latté Frappuccino.

>>12710783
>>12710438
>>12710388
This is the best I can do drunk on a Monday. Note that dq/dt, q, and t are independent variables.

>>12701536
retard engineers

>>12710975
seethe

>>12710783
Why is holodeck cleanup duty such a fucking meme when they have replicators, and therefore could just turn all the cum into energy

>>12708437
>not making the filename "candida parapsilosis" or, even better, "Babesia life cycle" to fuck with people using the HTML to cheat

>>12711220
>ywn have your cum turned into a chocolate sundae for Deanna Troi to slurp down and shit into space
Why live?

>>12711297
Is it truly made of your cum if it's turned into energy and then reformed into new matter?
Cum of Theseus up in here

>>12711350
>Cum of Theseus
Fucking lost. Just let me get a hold of the transporter and I’ll beam it into her sundae manually

>>12710968
Someone with a math background rate me on this, I know it ain’t perfect but I’m curious to see just how shitty it is. My intuition says the criteria for integrability of g should be much more rigorously fleshed out, but I don’t know.

>>12710968
Explain how you get from 7 to 8

>>12709007
You have to think through things for yourself: you're like a maths student complaining about proofs being left as exercises for the reader.
Just try convincing yourself that the only way two Lagrangians can give the same equations of motion is for them to differ by a total derivative.

>>12712068
Except he didn't leave this as an exercise to the reader. If he did, I would be completely ok with it. He genuinely thought P=>Q implies Q=>P. This is the kind of logic that physicists use.
Truly amazing.

>>12711887
Literally me. I wanted to be a frontend developer but some Jewish Physics teacher suggested me to read "A Brief History of Time". Now I'm suffering in grad school without any perspectives for a job.

>>12701359
Would be good if pi didn't change to sqrt(pi) for no reason.

>>12707721
Hairy ball theorem?

>>12712080
You need to read harder. It's not what he says.

>>12712033
I did

>>12712546
Why does the first term get multiplied by q?

>>12712423
10/10

>>12712560
Drunk math

>>12712333
>perhaps it will be wise to approach the subject cautiously
Hahaha

>>12705136
hey ive been in that room

>>12701435
Divergent sequence

>So how did you guys use the grant money?

>>12712789
That room is 5 minutes from where I live

>>12713988
I live in that room.

>>12714012
I live inside you.

>>12714012
You really need to get up and move around more, by the way.

>>12714043
I live topside
>>12714012
Your foreskin is dirty clean that shit nigga its staining my windows

>>12714569
Wanna meet up in the ballsack? ;)

I hate /pol/

>>12715786
>name technique you develop PENIS & CP as young grad student
>it's your career highlight
>you are known as the PENIS guy

>>12714757
Go ahead, refute him (protip: you can't kike)

>>12708262
holy shit thanks

>>12705022
why would you expect any of that

>>12716342
because he's a cs major

>>12712168
lmao i'm dumber than you but similar thing happened to me, i was at a community college getting a fucking A.A.S. in basic IT, but then i had a teacher who criticized the major for not being 'real computing'

now i'm a CS senior based on that comment alone

>>12716810
yeah so i am and im glad i dont have to do this stupid shit like ""analysis""

>>12699464
Had this interaction with customer support, didn't believe he wasn't a bot.
Anyway, a question for you PhD boys. I have been offered a PhD and this is my question:
Why I as a PhD student working in a well funded field am only paid as much as a bus driver... I just checked the salary and I make only $2k more per year.
I have offers from industry companies that will provide me with $20k more a year than what I make as a PhD student. Why should I stay...? The job opportunities also let me keep learning in a field I find interesting.

>>12699470
I guess he came to new insights.

>>12714757
/pol/ used to be good back before the boomers and the new wave of christcuck larpers.
Nowadays it's 99% jews poisoning the well and 1% the gullible retards drinking from it.

>>12708262
what the hell, of course, never thought of it

>>12717101
The main purpose of the PhD (other than your own happiness/fulfillment/doctor title/whatever) would be to get the jobs you're being offered right now.
If you don't care much for the PhD then definitely take the best job offer you got.

>>12717273
Thank you for the thoughts. It always helps me to hear different perspectives.

>>12717101
take the job, you can do the PhD anytime in your life, I think is even better when you have experience about the field and know problems that could be solved in your thesis.

>>12717101
most people around me (and me included) do it for the ego. but then again, I had a very good salary and the job was fun.

>>12717297
>you can do the PhD anytime in your life
you know thats not true ..

>>12701747
its well known that he posted here and he never denied it
>>12701994
bait?

>>12701498
Burger pie divided by beer.

>>12708771
Because addition is associative.

>>12701350
sauce?

>>12718965
https://ilikecomix.com/adultcomics/deviants-meet-your-new-lover-ch-1-aya-yanagisawa/

>>12701358
i don't get it, is it because it looks like a negative number?

>>12708262
Thank you panzer of the lake

>>12712789
Same anon, and I'm from the UK.

>>12712168
you didn't get the joke at all

>>12701361
Is that supposed to be Kurisu?

>>12701151
yeah Ted K. was a really smart mathematician

>>12708262
thank you, my mind has expanded a lot

>>12701359
damn