Archived threads in /sci/ - Science & Math - 416. page
Images are sometimes not shown due to bandwidth/network limitations. Refreshing the page usually helps.
/sci/ pls help me I have no idea how to do any of this shit and my test is tomorrow. Can you post post some vids or something on what this is and how I do it.
critical values and points of inflection
intervals of concavity
intervals of increase
>>7799228
Critical points is the only part i understand, but wtf is concavity? And what is the chart at the side I don't understand that at all.
>>7799267
concavity-based on the sign of the 2nd derivative
the chart gives the sign of the derivatives of the function on different intervals of the domain(x-vals)
Behold the king of /sci/
https://www.youtube.com/watch?v=REeaT2mWj6Y
>>7798920
>math atheists
maximum autism
>>7798920
When the Gödel theorem first appeared many mistook it for a paradox, like Russell's, a contradiction within a system of mathematics. Many included Russell himself, Wittgenstein and Zermelo, at least according to the traditional view, see however Russell's response to Gödel's incompleteness theorems for a different view. The issue was that the paradox only arises if one mixes the levels of language. Gödel sentence is unprovable in the object language, the proof that it is nonetheless true is done in...
Comment too long. Click here to view the full text.
>in freshman lab at my "prestigious" university
>first lab is fucking pipet calibration
>pipettes are impossible to fucking calibrate and the uni won't let us use micropipettes
gg ucla
>>7796713
>Not doing pure mathematics in undergrad to completely avoid team work and lab work.
>Not then doing a 1 year Masters in Mathematical [INSERT LITERALLY ANY FIELD OF STEM]
>Not then becoming the boss of everyone who took the undergrad option for that field
>Not then getting a 6 figure salary by your 5th year in industry
>ucla
You mean the school that pretends the most to be the Harvard of the west coast? Yeah, they're a huge joke.
And the faculty are so petty.
>>7796757
Nice. Care to share a pic of your rejection letter given by UCLA? It would be nice if you could attach to that the picture of your bitter and salty tears when you found out.
>y-yeah, so petty
If you could choose a single problem/conjecture to be solved in mathematics, which one would you choose?
RH
[math]\mathsf P \stackrel{?}{=} \mathsf{NP}[/math]
>>7793063
If P = NP, then obviously N = 1
SOLVED
Can someone explain the cost of a good undergrad STEM/Econ education to me? $70,000 per year makes absolutely no sense.
>>7789680
UChicago STEM/Econ degrees have one of the highest average ROI's in existence. Don't worry too much about the price tag as long as you plan on working afterwards.
>>7789686
How does one into Ph.D. In UoC?
>>7789725
Go to college at UoC
/Sci/, what the hell is this notation?
The first week of my Vibrations/Optics class, we get a basic math review. And most of it is literally middle-school tier.
Somehow I've gotten stuck on this. I've seen and used matrices before, but only in the case of augmented matrices for systems of linear equations, and I've never seen this kind of notation before.
What is this? I don't even need the answer, just the term to Google.
Thanks /sci/entists.
determinant
>>7801192
Determinant of a matrix?
Remember learning about Eigen Values?
Or about determinants?
>>7801192
Take the determinant of those matrices and set them equal to the value given.
So I'm sure this has a really simple explanation that I'm just not getting, but I'm wondering if you guys can help me.
In my textbook example of graphical symmetry, we're expected to calculate algebraic symmetry. The example we're given is x - y^2 = 1.
It claims that, of the y-axis, x-axis, and origin, it is only equivalent with the x-axis. The reason it gives is that...
>" x - (-y^2) = 1 is equivalent with
> x - y^2 = 1 "
How does that make sense? I...
Comment too long. Click here to view the full text.
>>7801056
A reflection about the x-axis will take x to itself (it's the hinge) and y to -y (bottom goes up, top goes down).
>(x - y^2 =1) =/= (x - (-y^2) = 1)
They fucked up the parenthesis
x - (-y)^2 = x - y^2
>>7801078
Oh I see what I did.
It's the exponent. A negative times itself is a positive to the -Y becomes a positive Y anyway.
So it is equivalent. My bad. Thanks for this.
Yo, /sci/.
Does masturbation lower intelligence temporarily (4 to 5 days)? I know masturbation takes the edge off and releasesays endorphins that stimulate pleasure and relieve stress, but can that cause your IP to nosedive?
I ask because I masturbation once a week (sometimes once every 5 or 6 days), and when I do, I feel like something is slipping away.
If you guys know that feeling that you have when you can tell your subconscious is working away at who know what, that is what I am talking about. And when I masturbate, that feeling goes away, and I feel...
Comment too long. Click here to view the full text.
Holy fuck, autocorrect really fucked me on this one.
>>7801034
at least someone fucks you.
Yes, ejaculating affects cognitive abilities temporarily.
>there is easily 10,000 times more archived information than you can ever know
REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
NUKE LIBRARY OF CONGRESS WHEN?
>>7801018
As long as they aren't hiding any significant mathematical proof then I don't care.
i've grown an increasing interest in both engineering, physics, and computer science. i haven't been able to separate myself with regards to studying how to program 3DCG, networks, database tree shit. same goes for physics due to condensed matter, solid state, QM, solitons, superconductors. then engineering for being able to do R&D for applications of these areas.
what can i do that lets me sort of pursue all three in one linear pathway in academia? can i do a mechanical engineering bachelors, get a physics masters, then a phd in computer science? or would...
Comment too long. Click here to view the full text.
>>7800532
Get the undergraduate major that covers most of the fundamentals you need for understanding the more complex graduate/doctorate topics. The more in-depth your fundamentals is the better.
Also, interests change overtime. By the time you're considering what your undergraduate thesis is, chances are that's when you'll actually be solidifying your path. That's the time you can make a more efficient decision as to what masters/PhD you want.
Although chances are you'll end up working...
Comment too long. Click here to view the full text.
>>7800532
Do you really need all that spoon feeding? Try learning them on your own. Especially CS since it's so very easy.
http://4chan-science.wikia.com/wiki/Mechanical_and_Aerospace_Engineering
http://4chan-science.wikia.com/wiki/Physics_Textbook_Recommendations
http://4chan-science.wikia.com/wiki/Computer_Science_and_Engineering
What do you think his IQ is?
Seriously, I can't find evidence on the internet. Is it safe to say it's over 200? Top 3 smartest people ever?
You don't "have" an IQ, you get a score on a test. On different tests you'll get different scores. Bill Gates has probably never taken an IQ test.
To convert your question into one that isn't dumb, yes, he very very smart. No, he is not one of the "smartest people ever," because there is no such thing.
>yfw Bill Gates was a math major and not a CS major
CS fags BTFO
>>7800547
>bragging about the "major" of a guy who didn't give two shits about school and dropped out
Does anyone have any recommendations for books on number theory? I just ran into the proof that quadratic surds can be represented as periodic continued fractions and that caught my interest. There seems to be a bunch of gems in number theory that I am unfamiliar with. Please share other neat results from number theory in this thread too.
>>7800274
An Introduction to the Theory of Numbers by Niven, Zuckerman, and Montgomery
A Classical Introduction to Modern Number Theory by Ireland and Rosen
Introduction to Analytic Number Theory by Apostol
>>7800274
This is taught in Calc 2 if it helps
Hardy-Wright
We are trying to reduce waste from sellafield and need to come up with an experiment of some sort. We have access to a cyclotron and access to a neutron bath.
We are drawing up blanks when it comes to finding something to test or carry out an experiment on. We do not have access to plutonium or uranium or highly radioactive waste/material.
Can anyone give us some ideas on what to do? We are looking at mainly the storage pools and the excess waste of plutonium. Any replies will be appreciated. Thank you.
>>7799912
All of the decay pathways are well understood. Just look them up and find ones that are either neutron or proton mediated.
Reduce which kind of waste? There is a huge range of stuff from waste material when making fuel to highly radioactive waste material from spent fuel and low level radioactive material such as used clothing.
Anyway, getting depleted uranium should not be too hard, there is a mountain of the stuff and people have no idea what to do with it.
Since I am a phycisist and have always wanted to exclaim "Stand back! I am a scientist!!" I'll offer a free suggestion: reduce waste by turning it to something useful.
Get some low level waste (avoid neutron...
Comment too long. Click here to view the full text.
...
Comment too long. Click here to view the full text.
If I locked 20 random people up and fed them exactly the same diet, would their poo eventually smell the same?
Not if their digestive system has pathogens beforehand.
If I locked 20 monkeys up and had them shitposting all day everyday would their shitposts eventually be the same?
>>7800555
Yes.
What arrangement of 8 legs will have the most vaginas between them, assuming that vaginas will only appear between legs that are distance x apart?
arrangement on what geometry?
Actually, too easy a puzzle, the following arrangement seems to be the most effective yieldings fourteen váginias:
_O_O_
O_O_O
_O_O_
__O__
Presumably, this solution also extends infinitely, with 7 legs being a hexagon, then further legs layering gradually to make larger hexagons.
Anyone got better geometric puzzles?
>>7799445
8 in what base?
