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I'll take a general topology course this semester and there's three books from its bibliography that I managed to download. Which would you recommend?
>Dugundji, Topology
>Kelley, Topology
>Munkres, Topology (2nd Edition)
I'm not a complete beginner, but I'd like to hear some opinions. Pic unrelated
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>>8636827
Lee, Introduction to Topological Manifolds
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munkres
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>>8636827
Here are the links if you haven't read them before
http://www.southalabama.edu/mathstat/personal_pages/carter/Dugundji.pdf
https://ia800501.us.archive.org/16/items/GeneralTopology/Kelley-GeneralTopology_text.pdf
http://webmath2.unito.it/paginepersonali/sergio.console/Dispense/topology%20%202Ed%20-%20James%20Munkres.pdf
>>8636831
It looks like it goes in a different direction from the others, not sure if it will help me out
>>8636834
Why?
Anonymous
Most difficult Subjects 2017-01-28 10:53:08 Post No.8636354
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Most difficult Subjects 2017-01-28 10:53:08 Post No.8636354
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Which subject did you find the most difficult for you?
For me it was electrical machines theory
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Mandatory swedish.
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>>8636439
suck it finland
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gender studies
i kept getting C for being male and also white
Anonymous
Why so many denialfags? 2017-01-28 09:28:07 Post No.8636135
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Why so many denialfags? 2017-01-28 09:28:07 Post No.8636135
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I mean I can tell you that manmade global warming exists and provide evidence, but then I'll get called out for being "liberal" and sucking climate scientists' dicks. Honestly I don't understand how the smart people here ignore the climate problem.
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hi sockpuppet
Anonymous
/sci/'s letter to the researchers of the hybrid project. 2017-01-28 07:27:53 Post No.8635934
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/sci/'s letter to the researchers of the hybrid project. 2017-01-28 07:27:53 Post No.8635934
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/sci/'s letter to the researchers of the hybrid project.
Anonymous
2017-01-28 07:27:53
Post No. 8635934
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ITT We write a letter and tell our thoughts to the scientists making Pig-Human Hybrids one word at a time
I'll start.
Dear
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Pesky
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Plumbers
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>>8635934
Pey'j was a boss. Is this game ever coming out?
Anonymous
Things that combobble your noodle 2017-01-28 01:33:33 Post No.8634598
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Things that combobble your noodle 2017-01-28 01:33:33 Post No.8634598
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Things that combobble your noodle
Anonymous
2017-01-28 01:33:33
Post No. 8634598
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>Electrons don't actually orbit a nucleus and can only be represented as a probability distirbution cloud for where they might be found
>polynomials of degree less than five have general formulae
> Until the 1960′s, the only reliable pregnancy test was to inject a woman’s urine into a female African clawed frog. If the woman was pregnant, the frog would ovulate within 12 hours.
>The human brain takes in 11 million bits of information every second but is aware of only 40.
>gonorrhea bacteria can pull 100,000 times their own body weight.
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>>8634598
>implications of existence of basis theorem
if this one doesn't blow your mind, you don't understand algebra
>QR factorization can determine roots of all polynomials in seconds, typically thousands of times less than 1 second
>constructing symbolic logic systems can predict reality
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>>8634598
>Electrical charges are the reason "you" exist
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>>8634598
>rats with maternal deprivation stress show enhanced LTP in the hippocampus in response to stressful stimuli in adulthood
>same rats extinguish stressful associations more slowly
>social isolation in development leads to social deficits, increased acquisition of drug use, and working harder for drugs in adulthood (rats)
>morphine administration in socially isolated juveniles reverses adult social impairment (not sure on amount, saved paper to read for later, wasn't relevant to my literature search)
>I was a maternally deprived socially isolated mammal
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210 = 2*3*4*5.
We should switch to a base 210 system with 210 individual single digit symbols. The first two digit number would be 210, represented as 10. 44100 would be represented as 100. All numbers would be represented much simpler, and this would give everyone a much better intuitive understanding of numbers, leading to better general mathematical ability, provided we can get over the initial hurdle of teaching people all the symbols.
Multiplication and division are also made easier due to 210 having four prime factors, so division of any number in this base does not yield a recurring number until the divisor contains a prime factor of 7 or above.
Is there any reason not to implement this other than the current ubiquity of the 10 digit system? I'm sure all the symbols can be taught at an early age.
"We have 10 fingers" is not a valid counter point.
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"We have ten fingers"
Actually, it's a very valid argument. Much easier to count with our fingers.
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Impractical, too many characters.
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How much utility
>Changing decimal system to 21-mal system
gives compared to how much it costs?
Have you tried making any computer program with your number system?
Have you tried checking if operations/data tables and shit work faster?
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>your major
>do you regret picking it, if so why
>what would you choose if starting again and why
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>>8631880
SE
Yes, only redeeming about it is the formal semantics and verification aspect.
I would choose mathematics or CE if I could start again because like electrical circuits, programming and mathematics.
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>>8631880
Programming/database dev and a solid, basic understanding of computers. I wouldn't change it. Computer skill is needed in almost all disciplines and programming is good practice in communicating precisely to get the correct answer.
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CS
Yes, I don't really like programming. I went to a CC and we did light programming so I didn't care. Transferred to UC Irvine and being forced with more programming but the assignments are wayyyy harder.
If I could change it I would probably
Choose stats
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We have much bigger progress in the field of genetics and biological engineering than we have in the field of robotics. Why do we need robots if we can already have biological servants?
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Because ethics. Aluminium humps can't be considered "living" because they are created from non organic material meanwhile biological subjects would be considered as animals if not even humans.
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>>8631425
robots work in fire and ice
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>>8631437
You know what makes a biological servant a human? A face. So let's make them without faces (and sex organs).
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how do i be good at mathematatics?
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By starting at some point where you are comfortable and doing slightly more and more difficult math. Keyword: doing. Reading about it it's not enough.
It's not like you're born knowing galois theory
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>>8641004
>galois was born knowing galois theory
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Practice and don't bitch or assume its some "oh I'm just not good at math :(" genetic predisposition
If a mineral can be scratched by your finger nail, is it necessarily softer than your fingernail? Can it fall into harder than a penny but softer than glass category instead? Picture semi-related but I'm pretty sure it's not talc.
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For something that a pure, crystalline mineral, yes, if your fingernail is scratching the surface it is softer than your fingernail in terms of Hardness.
That image is definitely Talc though, that's exactly what it looks like in nature, before being processed into a powder.
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I just picked a google image photo of a mineral that is softer than the fingernail. The pic I just took is what I'm talking about. Sorry it's not super clear. I can definitely scratch it with my fingernail.
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>>8640713
heh. I went ahead and chose softer than fingernail which was correct. Score 55/66. :-\ I'm not geologist. Hopefully, next weeks rock lab is a little easier.
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Finishing my undergrad Bsc in Physics this tear, and am thinking of doing a 1 year Masters in 'High performance and scientific computing'.
I have limited experience in Python from a simple Physics Simulation module I took and some project Euler problems I did in my spare time. I want to develop my computational physics skills this year before I start the masters so is there a recomended textbook to work through? Should I work through a Computational physics book or a computer science book?
I'm also doing a dissertation on Black holes, Gravity waves and the LIGO detector so if anyone can reccomend good background reading, that'd be great.
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>>8640573
You're probably going to want to learn C and Fortran. Python alone just won't cut it for HPC. As for books, I can't think of any (although I'll admit I'm not that familiar with the subject).
>background reading
Ask your supervisor
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>>8640573
>Should I work through a Computational physics book or a computer science book?
Why not both? In my (limited) experience, Computational Physics does not need super advanced programming skills, but it does require some knowledge about numerical mathematics.
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>>8640624
I think C and C++ is whats used mainly for the course but I heard Python is really useful in computational Physics too. If I keep learning Python will it help understand C/C++ when I start the course?
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Hey /sci/ I'm doing an engineering degree but my friend says my degree is completely unemployable despite being engineering. Is he right? I do agricultural engineering but I thought all engineering degrees are equally as good for employment?
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>>8640534
> agricultural engineering
I have never heard of this meme. What do y'all learn?
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>>8640534
I'm not sure if computer engineering would really work out for you
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>>8640540
We learn about farm equipment and machinery and improvements in that field. I would have figured it'd be high paying
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So, I hear that giant robots and giant aliens wouldnt be able to exist because of all the problems they would have with physics(square cube law, density, ect ect)
But why? There were colossal animals way back when, easily thrice or more the height of a giraffe.
So could someone who has understanding of biology and physics tell me why it's unfeasible to have a fifty foot woman?
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>>8640708
Simple really.
You double in height muscle mass only doubles but overall weight is squared.
There comes a size in which muscle mass can compensate.
Legs break bones snap human is dead.
In your picture... look at those fucking feet!
Increased surface area, short but wide legs with minimum joints and a small neck and head.
That is all nature can do with Carbon based DNA.
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>>8640719
so the overall problem for having a human like organism taller than we are is the weight?
Is there a way to circumvent this problem in a manner that might be somewhat feasible?
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How in the name of all that is holy would you maintain blood pressure at 70 feet?
Or did they just never raise their head up?
Can someone red pill me on linear independence? I see it in my linear algebra (of course) but now its in my ODE course. Where else does this fucking thing leech to?
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>>8640664
What the fuck do you need a red pill for?
A set of vectors is independent if none of them can be written as a linear combination of the others.
A set of vectors is dependent if at least one (all) of them can be written as a linear combination of the others.
That's it. Here's your PhD in linear algebra. Congratulations.
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>>8640685
I was more so getting at the implications of that.
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>>8640664
Who are those two?
Can anyone give me a quick rundown?
All matter is made of looped strings. All matter gravitates towards other matter in relation to distance. In a finite universe, it can be expected that all matter will eventually converge into a central mass. So, since all matter is implied to be converging like this, it's implicit that it's naturally moving towards its ideal state.
Because of the immense amount of this force would have on itself, all the O, O2, O3, Fe, everything would pull to the center of gravity, and this immense gravity well would cause all protons and neutrons to combine into a singular mass, with all the electrons being simultaneously cast out outside of its dense core(muh big bang???)
In this state, also, all the looped strings would become interwoven(might be interlooped but that sounds way more poetic for my hypothetical event). This would be of course a infinitesimally small amount of time, but for the moment when it was essentually one singular protoatom, it would be in mass's true form and ideal state.
If the building block of all mass is implied to be the string, then I would wager that all strings are attempting to reach this ideal state, which creates gravity by proxy. Now, because all matter is made of these, all matter could be implied to be broken or fractured as is in our present state. However, when all mass is encompassed into this protosingularity, it has successfully achieved its ideal state, and so its observable qualities would be indicitive of its building blocks, not how many protons it happened to keep after the fracturing.
Because what defines what an element is is its protons and such, in this case, the observable qualities of this mass would be more indicitive of its most basic parts and not of how many protons and such it has.
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>>8640531
Mass is just really dense photons, which weight like, 500 grams each. You know the real blasters they used in star wars fired photons that weighed up to 2 kilograms each?
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>>8640531
What textbook is this from? I was reading Feynman recently and he explores this theory quite well but not in as a comprehensive way as you've put it