Anonymous
how do we know we're in the 3rd dimension? 2016-05-26 02:45:50 Post No.8100308
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how do we know we're in the 3rd dimension? 2016-05-26 02:45:50 Post No.8100308
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how do we know we're in the 3rd dimension?
Anonymous
2016-05-26 02:45:50
Post No. 8100308
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I've started thinking lately that we're actually in the [math]\pi[/math]'th dimension and quantum theory is a result of us realizing those extra pieces of our fractal dimension. In the infinitely many other fractal dimensions on [math](3,4)[/math] the ratio of the circumference of a circle to its diameter would not be 3.1459265... and the limit [math]\lim_{x\to\infty} (1 + 1/n)^n[/math] would evaluate to something other than 2.7182818... but most likely [math]e^{i \pi} = -1[/math] would still hold for the new values of [math]e, \pi[/math].
discuss.
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>>8100308
>I've started thinking lately that we're actually in the ππ'th dimension
Prove it or fuck off
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>>8100308
Reading this post will keep me a way from /sci/ for a while (thank god), because this is most fucking retarded thing I have ever read here.
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>>8100308
The very least we know is that we live in something that is well described by 4D spacetime, per experiment. This does not preclude the possibility that has more than 4 dimensions (some advanced physics theories require up to 11D), but if there are more than 4 dimensions it is not obvious how they manifest themselves.
Some physicist have considered universes with different numbers of spatial dimensions and time dimensions, and while some of the arguments are suspect, the case has been made that there aren't many other combinations besides 3 spatial dimensions and 1 time dimension that seem possible.
Personally, I think there is something about the mathematical structure of 3D and 4D space that is fundamentally unique amongst nD spaces, and is why we experience the universe as it seems. I don't have many examples (please, if any one else has some, share), but there are certain group structures and things like cross products that only really work 3D. I wonder if someday we will be able to prove the dimensionality of the universe could be nothing other than 4 for the logical consistency of physics.
Anonymous
What's the worst machine? 2016-05-26 02:30:48 Post No.8100283
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What's the worst machine? 2016-05-26 02:30:48 Post No.8100283
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Like as in, the least-efficient or the one most needing of repair or maintenance, the one that breaks the most
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my heart
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>>8100288
Unless u have heart failure its probably actually a pretty good machine desu
>maintenance-free pump that works 70+ years nonstop
>blood is thicker than water
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Do plebeians really think mathematicians try to add/multiply/divide numbers in their head all day?
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No, they think mathematicians try to find new mathematical problems to solve all day or review and discuss older mathematical problems with other mathematicians.
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>>8100176
>they think ACADEMICS OF FIELD try to find new FIELD OF STUDY problems to solve all day or review and discuss older FIELD OF STUDY problems with other ACADEMICS OF FIELD
this can be said of any field and still be true
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>>8100169
OK fellas, I'll bite.
What DO mathematicians do all day?
(besides browse /sci/)
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Hi! I need help
I m 21 and today I visited my gynecologist. She found "something" on my right ovary and it is 76X6mm big. She hadn´t seen any blood inside of it. Also, it is hard on touch so it can´t be cyst. She also sent me to CT and to C125 test. First one is for 8 days and second for two. Now I can´t sleep, eat or anything because I don´t know what is going on. Is there anyone smarter?
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How old are you?
Do you get abdominal pain frequently? Do you get sudden severe stabbing lower abdominal pain with sex ever?
7cm isnt terribly large and unless you have family members with ovarian cancer or HNPCC I wouldnt worry too much. Probably a benign growth.
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It's cancer. I give it a year.
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>>8100039
1 year when it's already over 7cm?
6months if we're lucky.
What is /sci/ reading this summer?
>pic unrelated
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About wireless mesh nets
To overcome the NSA
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>>8099953
Do you know what book that is? seems like a tractable intro to relativistic hydro. I might want to check it out
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>>8099961
If that is the case, you should search papers about batman-adv
Based germany
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So my uncles rad-onc told him that he should proton therapy for his brain mass but I'm wondering how this shit works that makes it "better" than standard x-rays.
The only thing I can think of is that since protons, unlike photons, have mass, one can better control the proton beam's flux.
Thoughts?
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>>8099903
basically with x-ray you have to go all or nothing almost.
Which means you can destroy too much surrounding stuff, or not do enough damage.
With protons, as you said, they have mass and charge so you can give them a specific energy to start with, which determines how deep they go. They won't stop before, they won't stop after. Just at the right depth (relatively of course).
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>>8099916
Are protons themselves more radioactive than photons?
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It's quite expensive if you're not insured.
But neutron therapy is free of charge.
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Is there any book dedicated to learning Maths from the ground up? Like basically something that is quite comprehensive in teaching the fundamentals of maths?
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I've been wondering this as well. I could start with algebra and refresh fairly quickly, but ideally I really ought to start at the beginning.
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>>8099780
I'm comfortable with integral and differential calculus. Just my fundamentals are quite weak and there are a lot of gaps in my knowledge
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>>8099780
Learn mathematical logic and how to do simple proofs. How to prove it is a book that is self contained and very simple with the mathematics. If you do this then you'll cut down the time needed to learn mathematics in half as everything will be processed intuitivly
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You and your friend Sarah are both on work experience at the local vets. You have been asked to round the weights of some of the patients so that the correct tablets can be given. Oscar weighs 45kg. You think this should round up to 50kg but Sarah thinks it should round down to 40kg. Who is right?
A) Rounding up is right
B) Rounding down is right
C) Both are right
D) Neither are right
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fuck off atlas
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>rounding by more than 10% of the value
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Autistic virgin magician
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Have you noticed that it's more difficult to find examples of maths being useful in the real world than it is to understand and apply the maths?
Is all maths past school level, dare I say it, overrated?
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the best mathematics are mathematics that you feel the need for when solving a problem or studying a topic. Everyone has their own best mathematics.
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>>8099668
>Have you noticed that it's more difficult to find examples of maths being useful in the real world than it is to understand and apply the maths?
but you're staring at a computer screen op
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>>8099668
Congratulations, you just found out the secret fact /sci/ loves to deny vehemently. Applied math requires more intelligence than "pure" math. With a little bit of training it's not hard to become a proof robot who can memorize definitions, theorems and proofs. But a really smart guy like von Neumann recognizes what maths is needed for what real world application, and as a byproduct produces totally new fields of math.
Any news from the large hard-on (snicker) collider? Also could someone explain the higgs stuff again?
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hi, whats going no in this thread
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>>8099694
topkek
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Aren't they gonna like crank it up to OVER 9000 tev and prove there is no god or something?
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What is the fundamental difference between a surface that diverges to infinity for a bounded, uncountable, 1-dimensional subset of its domain or rather when approaching the outermost limits of its open/bounded domain (and remains diverging/undefined outside the region bounded by that limit curve), and a surface that diverges to infinity when approacing the infinite limits of its open/unbounded domain (as in a paraboloid)?
Is the former surface somehow infinitely steeper than the latter?
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>>8099604
Obviously the first one gets much steeper much faster. This about like asking the difference between [math]y=x^2[/math] and [math]y=\frac{1}{1-x^2}[/math].
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>>8099604
>What is the fundamental difference between a surface that diverges to infinity for a bounded, uncountable, 1-dimensional subset of its domain or rather when approaching the outermost limits of its open/bounded domain (and remains diverging/undefined outside the region bounded by that limit curve), and a surface that diverges to infinity when approacing the infinite limits of its open/unbounded domain (as in a paraboloid)?
How correct is this sentence in terms of formal mathematical terms and definitions? Would you choose some terms differently when expressing what's being asked?
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Do you like the thin manifolds? Aren't they somehow pleasant and interesting?
Anonymous
Let us talk about Nazi and their mysteries 2016-05-25 21:01:48 Post No.8099602
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Let us talk about Nazi and their mysteries 2016-05-25 21:01:48 Post No.8099602
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Let us talk about Nazi and their mysteries
Anonymous
2016-05-25 21:01:48
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I know this is an Old topic but I've never feel boring about Nazi. There are no concrete evidences about what the hell were they doing but everything they were doing, I bet it has something really important, something brilliant.
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Oh i know this one. The pic you posted the topic with is a theory that the nazis had a time machine and used red phospherus t opower it.
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>>8099602
so wtf do you want to talk about opee
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Glocke; The Wonder Weapon was nothing more than a Neutron Bomb, meaning it gave off radiation killing enemies, but did not damage infrastructure.
It was a failed experiment since they could only get it to work in a small circumference.
Those affected by the radiation died, so the research couldn't continue.
Soldiers that told stories of it floating didn't understand the testing procedures, which included suspending it from wires to better study it.
And yes, they DID use a water cooling towers base to suspend it from because it was already built and they were trying to save money during the war.
Anonymous
Contract Signed For Worlds Largest Telescope 2016-05-25 20:41:14 Post No.8099564
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Contract Signed For Worlds Largest Telescope 2016-05-25 20:41:14 Post No.8099564
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Contract Signed For Worlds Largest Telescope
Anonymous
2016-05-25 20:41:14
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The contract for the dome and telescope structure of the European Extremely Large Telescope has today been signed. The E-ELT is expected to achieve first light in 2024 as the worlds largest optical/infrared telescope at 39.3 meters. The 400 million euro contract is the largest stake in the E-ELT investment and puts the telescope on track to not only be the largest and most ambitious but also the first of a new generation of extremely large telescope.
The E-ELT will tackle problems in galaxy evolution, study exoplanets as well as cosmology and the large scale structure of the universe. It's near infrared imager will have about 8 times the resolution of the Hubble Space Telescope or the James Webb Space Telescope. It will reach deeper in spectroscopy that JWST and imaging at short wavelengths to study some of the first galaxies in the detail JWST will lack. It will reveal in 3 dimensions the processes that fuel galaxy formation as well as the mysterious Inter-Galactic Medium. With spectroscopy it discover and characterize earth like extrasolar planets, perhaps being the first facility to image rocky planets. It may even detect the expansion of the universe in real time over 20 years, if stability requirements can be met.
The E-ELT project has today taken a big step to transforming astronomy.
https://astronomynow.com/2016/05/25/eso-signs-e400-million-contract-for-e-elt-dome-and-39-metre-telescope-structure/
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>>8099564
How can it be better than JWIST if it's on the ground?
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>>8099589
It can outperform it in resolution with adpative optics. It outperforms it in some aspects of sensitivity by being fucking huge, it also has visible light capability.
Adaptive optics uses deformable mirrors to correct for seeing, the bluing affect of the atmosphere. Ground based telescopes can now recover the sorts of resolutions they would achieve in space. It has caveats, it is for now limited to the infrared and it works over small fields. E-ELT will push these constraints however and get a field of view that's only a few times smaller than JWST but with much more resolution.
Pic related is an Adaptive optics demonstrator on a 4 meter telescope outperforming hubble in the infrared.
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>>8099609
Some more info on AO.
https://en.wikipedia.org/wiki/Adaptive_optics
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>junior year in high school
>took average math, algebra II
>did well but it was average math so who cares
>senior year I wanted to take an "advanced" "math" class so I took AP stats
>I was surrounded by formed calc I and II students all year who lightheartedly teased me about being in such an "average" math class prior to then
>I ended up getting A's in both semesters of stats while most of the calc students got B's or lower (albeit a small handful did really well)
I know calculus and other actual maths are classified much differently than statistics, but does a person's skills in statistics have any ties with their skills in calculus, trig, etc.? Or are they two completely different things? Is it better to be good at one over the other?
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>>8099325
>high school calc
There's your problem. They rote-memorized their way through an already watered down course.
Calculus shouldn't be taught in high school at all. They should drill the fuck out of kids with trig and logic to prepare them for the actually difficult courses. The whole AP thing is a misguided sham.
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>>8099325
Stats isn't math.
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>>8099334
This, don't ever forget it.
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are there methods to remember what you read besides spaced repetition? if i read some book now i know i'm not going to remember most of it in about a month unless i review it. are there methods that make this less difficult?
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>>8099160
genetics
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>>8099160
just think about it a lot.
good gif btw
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>>8099160
If you really want to remember something I'd suggest writing a summary of it. Not type a summary, but write one.