How do I improve at math? Please be specific (study strategies, certain textbooks, etc.).
Right now I am taking an introduction to proofs course. Next semester I take real analysis and discrete math.
>Expecting specific answers when you don't ask specific questions
>>6845446
Study a lot. The only way.
>>6845446
If you haven't figured that out yet, give up.
After the Chernobyl accident somepeople feared that the molten fuel would explode with a force of 3 megaton, can someone explain how it would explode? I don't really understand
>>6832381
it would explode like
>BOOM
with a force of 3 megaton
I think they were worried it would melt through the concrete foundations and come into contact with ground water making lots of hydrogen when it did, then that hydrogen would cause the explosion.
>>6832381
You can`t get an atom bomb explosion (fission or thermonuclear3784) from a nuclear power plant. Explosions always come from steam pressure in sealed vessels, but three megatons sounds way too much.
Hey, I want to learn JAVA and PHP and need a decent beginners book that actually teaches the language, not just decent as a reference manual. And no, code academy and online tutorials won't work. I'm looking for a great paper page book. Any thoughts?
Is this your first experience with programming?
>>6809594
No, I took c and c++/c# a few years ago and understand the logic of programming, I just need a decent way and examples to learn the new ones. I learned SQL in about thirty minutes, but realize I need java and php to trigger the sql events. I just haven't find a book that satisfies both a comprehensive guide and the beginner to java and php qualifiers in the reviews. And yes, I googled, Amazon, and reddited for recommendations hags
Spivak's Calculus is a god-tier book
Post god-tier books
>>6798518
>god-tier
>god
plz op we use sagan-tier here at /sci/
>>6798518
Massive fan of Discovering Statistics using SPSS by Andy Field.
Also Optimization using Operations Research by Ronald Rardin comes very highly recommended.
Ron Larson, Calculus, 10th Edition
(serious) are there any US kids that are in/went to universities in other countries? How are their STEM programs?
I'm from Europe, but I went to elementary school in America. Finished highschool back in Europe and am now studying astrophysics.
>>6802677
doesn't really apply to the OP
>>6802672
also curious because I can't get into any good schools in US unless it's in some bible belt religion>science/sane state
I just read that there's a 50% chance that a GRB caused one of the major extinctions on Earth in the past 500 million years.
Question… how do you protect yourself from a GRB if it hits Earth? Would lead-lining in your basement protect you? How much lead do you need to stop GRB?
>>6786928
So you're going to refuse to leave your basement, just in case of an event that happens every few hundred million years?
Some Deep subterranean caves caverns etc. like sexy woman down in Peru
>>6786934
>So you're going to refuse to leave your basement, just in case of an event that happens every few hundred million years?
GRBs can last for some time. You'll have time to escape.
New Zodiac unveiling thread!
Latest news:
>The 340 cipher is being cracked successfully
In addition to Aquarius, the mention of Taurus has emerged. There might be a pattern here.
Old thread:
>>6770005
>>6775174
>The 340 cipher is being cracked successfully
then post it, with used algorythm
>>6775185
Read previous thread. That's obviously not going to happen.
>>6775187
>Read previous thread. That's obviously not going to happen.
ok, I will read. But this makes your work less scientific, as it cannot be verified.
Guys, please help me. I'm about to crack the so far unsolved 18 last letters of the Zodiac killer's first letter.
This one:
>EBEORIETEMETHHPITI
I'm so close, you guys. It's all lining up. It's all coming together.
The only thing I need to know is why this
>http://www.acronymfinder.com/~/search/af.aspx?Acronym=VWYP&string=zip
brings me to San Francisco. Why "VWYP" brings me to San Francisco when entered in the location finder on acronymfinder.
I can't see anything related to those four letters, except (Los) Vaqueros Watershed being nearby (VW), which undoubtedly is going to tie it all together (murder at VW hinted in decryption).
But why this? Those were the only four letters I couldn't make sense of (I thought), but trying to find out if it's an acronym, I entered it in the location search, and it brought me exactly here, of all the places in the world.
Please help me understand, /sci/. I don't know where else to turn but here. I'm so close, /sci/.
>VWYP
Is it even objective? Does it take you guys to San Francisco too?
>>6770010
It puts me in Tracy. West Valley Mall? I can't tell how this thing operates.
>>6770029
Yes, Tracy!
I just can't figure out what the relationship between VWYP and Tracy is. Or how this guy found these letters. Almost like he knew that fucking acronymfinder would lead me there. Simply typing it into Google Maps doesn't work.
I might have to find some numeric values, maybe there are plain and simple coordinates or an area code in there that acronymfinder.com can detect for some reason. On it.
Post some amazing facts.
I love these. I've only seen a couple that are really good, though.
>>6731747
- Neil "The Grass" Tyson
>>6731747
There are more synapses in your brain alone than there are stars in our entire solar system.
I noticed that \int_0^1 \frac {dx}{(1+x^2)(1+x^k)} is always \frac{?}{4} \forall k \in \mathbb{R}. Why is that? Also, does it really happen for all k? Is there a proof?
>>6713376
bump
Can't believe that all the shitposts receive all this attention and a genuine problem like this doesn't.
>>6713404
bump
It works similar to the puzzle with the sixes. But yet very different.
The goal is to complete the equations. All mathematical symbols can be used but you can not add numbers.
It works with the use of only these symbols: + - * / () ! abs() sqrt().
Can you solve it?
>>6709835
Can we use each symbol more than once?
>>6709837
Of course.
>>6709839
Cool. For some reason I thought I was still on /tg/.
(0*(1+2+3+4+%+^+8+9))+7
Why do so many great mathematicians just quit and do something stupid instead?
Grothendieke quit to write stupid political and environmental shit. Perelman quit to pick mushrooms. Galois quit to pick up chicks and get involved in politics... etc.
What inadequacies do geniuses see in math that makes them realize how trivial it is? Is it just tautologies?
>>6700959
It's not because they realized math is trivial, it's because they got old.
>>6700972
>old
Galois was like 20 or someshit...
>>6700959
>Galois quit to pick up chicks and get involved in politics
Galois didn't quit. He was challenged to a duel. It's speculated that the challenge was over a woman or that it was political but no one really knows for sure. What is known is that the night before his duel he stayed up and wrote down all of his mathematical research and ideas and entrusted it to his friend so that it wouldn't be lost forever in case he died (which he did).
Grothendieck thinks the world isn't ready and burned a bunch of his mathematical manuscripts. He also reached out to stop others from republishing his work.
Perelman left because a bunch of dudes tried to steal credit for his proof. So he thinks the mathematical community is a bunch of douchebags.
I-I'm scared /sci/. It's gonna be okay right?
https://www.youtube.com/watch?v=7Pq-S557XQU
The transition to an automated workforce will be rocky but the end result will be desirable, effectively enabling people to have complete self determination in what they do with their time. While people are panicking at the robots taking their jobs, they will be enjoying the highest standard of living ever achieved and sooner or later everyone will calm their tits.
There's nothing to be afraid of, anon.
>>6699243
Luddites are retarded.
Let's talk about antidepressants
>Proven to be only marginally more effective than placebo, even in studies funded by pharmaceutical companies which are biased
>Doubles the risk of suicide
>Have many unpleasant side effects
>Are obviously chemically addictive, despite constant claims that they are not (they cause negative withdrawal effects and cravings and effect the same neurotransmitters as many street drugs)
>Cause higher probability of relapse (resulting in more prescriptions)
>Can easily cost over $100 per month (mine were $120 a month)
>Rates of prescription have risen by over 400% since 1988
>Based on 'chemical imbalance' theory which was debunked years ago
>Raise pharmaceutical companies over $50 billion per year
source:
http://www.alternet.org/story/156232/take_a_pill%2C_kill_your_sex_drive_6_reasons_antidepressants_are_misnamed/?page=entire
http://healthland.time.com/2011/10/20/what-does-a-400-increase-in-antidepressant-prescribing-really-mean/
http://science.howstuffworks.com/life/antidepressant.htm
http://www.psychologytoday.com/blog/the-first-impression/201302/5-myths-about-depression
/sci/, what is your opinion on antidepressants? It seems like a shill to me, I'm genuinely curious as to what you guys make of this.
>>6668554
>Based on 'chemical imbalance' theory which was debunked years ago
wait, people have been telling me about this a lot. I didn't know it was debunked. what's the deal?
>>6668564
It was never debunked, we just don't know shit.
But yeah, psych meds in general suck ass. Olanzapine here.
>>6668567
Psychology is not a science, anyway.
Also, you should check out the links.
/sci/...
/sci/.....
http://www.amazon.com/gp/product/1593274130
are these any good? I saw a calculus and physics one as well
I might get them for my friend who is a NEET and spends all day playing vidya and watching anime
>>6668691
"my friend"
Sure.
>>6668693
well I took the intro calc physics and linear algebra classes in college
although it wouldn't hurt to review my linear algebra!
![Astrological-Chart-597x586[1].jpg](https://i.imgur.com/PssjOqb.jpg "Astrological-Chart-597x586[1]")
