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Archived threads in /sci/ - Science & Math - 29. page
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are dual degrees a meme /sci/?
>>
Ye
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>>8514426
Lrn2meme, trollfag pls
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>>8514426
No, you get 2 degrees for the price of 1.

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Is there a function or formula that, given an ordered pair of cartesian points, returns an angle, or even a (sin, cos) pair that points to the input pair from the origin point?

Pic somewhat related
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>>8514339
arctan(y/x)
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>>8514349
Neat, thanks.
>>
Hol up.

What if x = 0? This equation also is unspecific to whether x is positive or negative. The result has an interval of (-90, 90) and instead should have an interval of [0, 360) like it's a unit circle.

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How many distinct 3-colorings of the edges of square?

I'm trying to use Burnside's Lemma but I'm not getting a natural number.

I'm getting $\frac{1}{8}\left ( 3^4+3+3+3+3^3+3^3+3^2+3^2 \right )=20.25$

where the numbers in the parentheses (in order) are the number of configurations fixed under
1: 0 degree rotation
2. 90 degree rotation
3. 180 degree rotation
4. 270 degree rotation
5. reflection across vertical axis
6. reflection across horizontal axis
7. reflection through one diagonal
8. reflection...
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Help me out guys. I feel like I'm overlooking something really simple.
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There's gotta be at least one person on /sci/ right now that knows combinatorics.
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>>8514290
lol no were too busy shitposting

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So, lots of famous people have argued that we're living in a simulation, but so far, no one famous has argued that we're NOT living in a simulation. Really stimulates the ol' synapses...
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>>8514118
Isn't it just another way of saying there is a god in a way scientists will agree with you

Is god the computer, the guy who made the computer, or both?
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How crappy is the future if we live in a simulation of the past?
>>

Tell me what you are reading.

I'm finding non-theoretical textbook to read in the coming holidays, but anything is welcomed.
I'm reading pic related, despite the title it is not that popsci-ish.
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Richard Muller is a faggot. He's one of the many reasons I quit Quora.
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>>8514081
He can be annoying at times but I like his writing.
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>>8514075
Pop-Sci tops out at Road to Reality, see you on the other side

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>Be mathematically illiterate.
>Take baby's first math class at community college.
>Work hard on math, do OK with a B average in the subject.
>Be in college algebra now.
>80% grade with final and one chapter exam to go.
>Worried I'll pass the class only as a technicality without really understanding all of the material well enough to advance on to Trig and calculus and do well in...
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Just do extra problems in the book. Math skills are like a muscle. You gotta practice.
>>
I'm sorry you're in this pickle. I'm not a math expert and I'm only here to learn and see what I can find as well. My only reccomendation is going to the biggest book store in your area (or at least preffered) and find some science and math books. I know on vacation I found a "Books a Million" store with all sorts of cheap science and math books all under 20 bucks a piece. I know this price kicks the shit outta college mandated, although I can't confirm any of that would have what you're looking for. I'd say the best way to understand...
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>>8514057
1) Practice more.
2) Focus on understanding stuff instead of memorizing how to do particular textbook problems.
3) Practice more.

>Math has gone so breadth and deep that no one is expected to understand all topics
>In 2010, while attending the International Congress of Mathematics, Gowers wrote:
>...I decided on two prodigies: Marianna CsÃ¶rnyei and Jacob Lurie. Marianna I have known quite well for many years, and she works in areas that I can be expected to understand...
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Math is an abstract notation system anyway
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>>8514015

lol nigga did you expect to even get to masters level math, you fuckin pleb kill yourself you probably are only in calc 2
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>>8514022
Most of science is.

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Is statistics the pinnacle of mathematics?
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Yes desu
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>>8513932
Electrical Engineer working with stats here.
I approve Statistics as the pinnacle of Mathematics too.
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No, vortex math is the pinnacle

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I have an invention in the usa and i need to patent it, how do I go about this.

I dont want to spend a lot of moneys

I got fleshed out 3d models
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>>8513907

http://4chan-science.wikia.com/wiki/Universal_Material#Legal_Matters

>I dont want to spend a lot of moneys

Then don't do it.
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>>>/biz/
>>>/g/
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>>8513911
Well obviously i gotta do it

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Struggling with my genetics experiments. Breeding fruit flies and looking at their eye colors.

Out of 229 flies, I got 173 wild type, and 56 sepia. That's 75.55% and 24.45%. A textbook clear example of 3:1 inheritance of a recessive allele.

But the chi square analysis says that I have to accept the null hypothesis, that it's just coincidence. Something about that seems wrong when the data fits so perfectly.
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I am going to start studying genÃ©tics next year, mind giving moar details Senpai?
:^3
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>>8513903
This is a very simple experiment on inheritance tracking eye color. Wild type is a brick red (as shown in the op picture) and sepia is a yellow-brown color.

We did two crosses. 4 female sepia x 4 male wild type. And 4 female wild type x 4 male sepia.

Allowed them to breed, and isolated the F1 generation. All of the F1 generation have wild type eye coloration. From the F1 generations we crossed 4 females and 4 males.

The F2 generation yielded 229 flies total, which we counted as 173 wild type and...
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>>8513895
the most important thing you can do at this point is learn how to make a standard deviation

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The Druly lane theatre has 17 seats in the first row and 26 rows in all. Each successive row contains one additional seat. How many seats are in the theatre?
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>>8513795
bout tree fiddy
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767
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>>8513800
You're a wiz bro. Thanks. I was seriously about to pull out a separate scratch paper and do 17+18+19... 26 times. I tried Gauss and had no success.

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What is a protovirus and why does it make you smarter?
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Australia literally and unironically BTFHO
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>>8513793
Maybe the viruses are what codes our DNA and builds the reality experience in this simulated matrix. Am I in the right thread?
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>>8513797
Aboriginals are why that is. They literally are not the same species as us.

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What is the most difficult thing you have had to prove for a math class? Were you successful?
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>>8513719
Took putnam today. I'd say those pretty tough. Only solved A1.
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Let $n$ be an odd integer $>2$ and let $f(x)\in \mathbb{Q}[x]$ be an irreducible polynomial of degree $n$ such that the Galois group $Gal(f/\mathbb{Q})$ is isomorphic to the dihedral group $D_n$ of order $2n$. Let $\alpha$ be a real root of $f(x)$. Prove $\alpha$ can be expressed by real radicals if and only if every prime divisor of $n$ is a Fermat prime.
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Let $R$ be a ring.. Does $R^m \cong R^n$ (as left $R$-modules) imply $m=n$?

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So when I say "x is an element of the real numbers", could that mean that x could still be imaginary? Is it more appropriate to say that x is a subset of real numbers when I am saying that it isn't imaginary?
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All numbers are imaginary
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>>8513675
THIS ISN'T FUNNY.
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>>8513671
>could that mean that x could still be imaginary
Why? Your reasoning isn't at all clear here.

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I have about a month to study whatever I want this break. Any interesting books that don't require too much previous knowledge that could be enjoyable? (I have a background of 2.5 years of European math)

I was thinking something like Aluffi, Algebra Chapter 0, Topology by Munkres, or some book on easy differential geometry like Do Carmo.

Also /book/ general
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How about you take off the little baby training wheels and study some American math?
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>>8513650
what im trying to say, is that i took real and complex analysis, abstract algebra, etc in my first two years instead of 100 credits worth of general electives and "intro to proof" courses
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>>8513623
Study french OP

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How likely it is that paranormal activity and afterlife actually exists? Is our material/pragmatic view of the world really correct?
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>>8513607
Little, theres no evidence to substantiate the claim

It'd be extremely unusual for the conscious and soul of an individual to somehow leave the individual to run about the world without a capsule let alone transfer between them
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>>8513607

The dead are judged and are sent to heaven, hell, purgatory, or limbo. They can't get "stuck/lost" along the way.

Sometimes the dead do appear through the will up high but just long enough to give a message to the living.
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2%

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Is there any real science behind meditation, or is
it just a placebo? If there is science behind it,
which kinds? Does anyone know anything about
this, or is it a waste of time?
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>>8513598
Meditation is objectively healthy in moderation. I don't do it anymore because I have kids and work and study, so a spare hour in the day to sit around not thinking about things is pretty hard to come by.
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>>8513598
If by placebo you mean something that only works because it makes you feel better then yes. Obviously. That doesn't make it a waste of time though, if it works it works.
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>>8513598
Yea dude, dalai lama went to a conference this year that had a fuck ton of scientists doing shit like this shit maaaaaaaaaaaaan.

But for real, science has been doing this.

Quite honestly, i don't see much difference in that what buddhism describes and what neurology is doing.

The only difference is that of the reference point you base your "considerations" on.

Science has it's way, and buddhism has it's way.

The bridges will meet. science demands more rigor and proof.

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>State your background and/or area of expertise (or at least what you think you feel comfortable explaining)

>Ask a question: What is something outside of your field that you've always wondered about but haven't found a fulfilling explanation for?
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I'll start

Background
>BS in Geology and Geophysics
>MS in Geophysics and Seismology
>Work in the oil and gas industry
>Informal background in applied math

My question:
>How close are we really with superconductivity for practical applications? What have been the major breakthroughs and limitations?
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>>8513583
>Doctor of Medicine
>Currently in speciality training- Cardiology
>Experience of Intensive Care, General Surgery, Stroke medicine, Respiratory medicine and General Internal Medicine
>Some lab-based experience in immunology

When will quantum computing become more widely available and what technological challenges do we need to overcome in order to achieve this?

Also, would government...
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>>8513604
How do you sleep at night knowing that you're contributing so heavily to wrecking our atmosphere?

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does anyone know any good TI-84 programs that will do derivatives or integrals and output the answers in exact form. Like the derivative of ln(x) would come out as 1/x, or integration of x comes out as x^2/2 instead of showing decimal values?
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>>8513577
the human brain
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>>8513592
this.

Just learn calculus. Learn it properly. It doesn't take forever and it's not impossible, it just takes some motivation.
I can't think of a good reason why you'd need to use that the integral of x is x^2/2 without learning that it is so.
>>
If you don't know ln(x) and power derivatives off the top of your heads this far into the semester, you are going to fail irrespective of what you put on your calculator.

Basically, we spent like half an hour debating what (Or if we could) pi look like converted into binary. We came to a few different answers but none were conclusive. So I'm enlisting your help because this is a science board...For Science...And stuff.
>>
The way irrational numbers are usually represented in binary is through floating point http://www.toves.org/books/float/ , however you obviously can't represent the entirety of the irrational number in that way.
If you had infinite space, you could represent PI in binary by simply converting every number into its binary equivalent
3.14... => 0011 , 0001 0100...
that wouldn't be floating point format, but it would be the simplest way to represent pi in binary (but again, you'd need infinite space to store the bits)

Third way would be to use the...
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>>8513574
11.00100100001111110110101010001000100001011010001100001000110100...
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>>8513574
Yes, exactly the way we "convert" it into decimal. The positions on the other side of the decimal, rather than being 10ths, 100ths, 1000ths, etc, would be halves, fourths, 8ths, 16ths, etc.

If our reality is space to bacteria, is Gods reality what we perceive as Space?
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bacteria don't perceive space. god's reality could be much more vast than space or our universe. we can't know, we won't know.
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>>8513581
How do you know they cant perceive space?
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>>8513569
>>>/his/

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>>8513561
>fractions
I believe in Germany in 4rd/5th grade.
>polynomials
Depends how deep. baby tier (elementary algebra) beginnign 6/7 grade.

analysis, linear algebra, stochastics, ... in 11/12 grade then
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>>8513561
literally kindergarten math, kill yourself pleb
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>>8513561
>fractions

>polynomials

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Hey scifags, can you figure out which ten equations I used to make this shape?
>>
yes, but why bother
>>
>>8513463
sinusoids circles 1/x's and x's

won't bother with the actual parameters
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>>8513463
y=x
y=-x
y=1/x
y=-1/x
y=2cos(x)+2
y=-2cos(x)-2
x^2 + y^2 = 2
x^2 + y^2 = about 5.3

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Why does soap lyse a cell? If the soap has polar and nonpolar ends, that makes it like a phospholipid in the cell membrane. So why does it lyse the membrane, and not just become incorporated into it?
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>>8513263
Thaaat's a good question. I'll ask my biochem prof.
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the polar end of a saponate molecule is sterically bigger and bulkier than the nonpolar end, so the molecules tend to form spherical microdroplets rather than bilayers. (think about how rods stack together versus how cones and pyramids don't, because one end is bulkier than the other.)
because bilayer membranes can be fairly continuous but droplets are limited to small sizes (assuming all nonpolar ends are oriented to the surface) this disrupts cell membranes.
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>>8513307
Thank you, random internet person

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This should obviously be wrong, but where is the mistake?
>>
it's right.
when you work with complex numbers you can always do that shift to get prettier equations
like in the Schroedinger equation and Cauchy's integral formula
>>
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>>8513121
X^2 = 4
2=X=-2
2=-2

dude maths lmao
>>
>>8513121
The amalgamation of square roots is only a valid operation for real numbers.

I took the Mensa IQ Test and was allowed to parcipate and become a member, but this article made me think: http://wrongplanet.net/forums/viewtopic.php?t=102398

are they really so anti disabled people? Is it filled with ableists?
>>
>>8513104
Lol that was pretty hard to read dude.

The special interest groups are about all that's worthwhile in Mensa. Otherwise, it's pretty self-congratulatory and useless considering the dues.
>>
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>>8513104
Mensa is a cringe gathering of autism. Sure, they scored well on a test, but by all means they are mostly a bunch of phony intellectuals. People who are actually intelligent are too busy making a career.
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>>8513127
what do you mean with autism?
I thought they were very unsupportive of diabled people?

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what did /sci/ do to contribute to their science fair? Anyone seen any kickass projects? Looking back on grade school/high school science fairs would you rather have done something else?
>>
>>8513093

Cloud Chamber
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>>8513093
I had two science fairs back to back (5th and 6th grade), for the first one I made an "electromagnetic cannon" which was basically a short coil gun and I got like a 93 for it. The second year I went all out and got Drexel University schematics for a hovercraft, scaled it down and made a small one that would run around the table with a ducted fan motor. I got an 83 with a note that said "More of an engineering project than a science project"

I'm an engineering student now.
>>

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Why do I look different in photos than how I do in the mirror?
>>
One reflects light the other absorbs it.
>>
Lighting, angles and reversed perspective
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>>8513080
Flip your photos or rig a very complicated set of reflectors to make your mirror image not mirrored

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What can I do with a degree in mathematics?
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>>8513038
Know more than anyone else about actual truths.
>>
work at starbucks
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>>8513040
How far does that get me on life?

Ok /sci/ 1/3=.333 repeating. Right? so that means 3/3=.999 repeating so therefore 3/3 is not a whole fraction
>>
mathematicians have taken to calling the missing element of 3/3 a "dark fraction"

only time will reveal to us the mysteries of these "dark fractions"
>>
.999 repeating = 1
>>
>1/3 = .333 repeating
No

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