Archived threads in /sci/ - Science & Math - 1860. page

>>7926034
That isn't a funny joke at all.
What "A+ maths student" would assume that "fraction" meant "fraction involving only rational numbers"?

>>7926034
thats not even right

>>7926062
A+ math student detected

>>7925621
Without having any knowledge of the university that awarded it, I tend to put all degrees from EU nations on equal, favorable footing. The same goes for US, Soviet, Canadian, Australian, New Zealand, Japanese and South Korean PhDs. I'm a bit leery of modern Russian, Chinese, and South/Central American degrees, and I discount Indian, African, and Arab degrees almost entirely.

>>7925764
> Japanese, South Korean PhD
I don't know why you think these two are equal to US in PhD because my friends who aren't good enough to get into America apply to them as a sure win backup.

>>7925812
It might just be personal bias on my part, and it also might be due to my field. As an American, I generally deal with chemists that have US PhDs, but I've also met Japanese PhDs that are on par with their American counterparts.

because ever since we've been able to isolate disaster-class bio's such as polio, the implications have become too dire. this may seem blunt, but when you think about it, can be applied to every scenario

we would need the ability for a computer to very quickly isolate and contradict any threat to the collective before we allow the power of bio to surpass our ability to understand it

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>>7925604
Pharmaceutual companies spend LITERALLY, L I T E R A L L Y 80%(EIGHTY PERCENT) of their money on advertising.

It's fucking disgusting.

why ur mom's such a whore

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>>7925753

>>7925587
the navier stokes one. we probably wont get a general solution out of it, but heres hoping.

>>7925445
Extremely easy.

>>7925774
Not OP, but follow-up question:

How hard is it to triangulate where someone is transmitting from? Asking for a friend...

Bumping cause this seems interesting

I'd pick a number one digit below mine. That would ensure I have the world to myself

>>7925337
pi

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>>7925337
100.

>>7925167
Why are you such a colossal faggot? Why do uninformed people keep asking questions on things they never studied, assuming the most batshit retarded positions?

>>7925171
The sun's coronal heating problem is an unsolved problem in physics dumbass

>>7925167
>Does that mean Maxwell's theories about magnetism and thermodynamics was wrong? How do we know Maxwell wasn't wrong about other things like the speed of light having a speed limit?

Wrongheaded, theories are not correct because their theorist is correct, they're correct because they align with observation.

I wish I looked like Okabe

Mathfag here; I can research in my underwear all I like.

Nobody does.

besides ? 11, of course.

Not really but AS a physicist i can tell you, that if you struggle with these questions you should not even try getting into physics

Maybe this is a bit clearer: I want to minimize
[eqn] \sum_{i_1=1}^{m_1} \cdots \sum_{i_d=1}^{m_d} \left( M_{i_1,\dots,i_d} - \sum_{i=1}^{n} V_{i,1,i_1} \cdots V_{i,d,i_d} \right)^2 [/eqn]
with respect to the Vs

>>7924862
take the derivative, set equal to zero, solve, profit.

>>7924899
yes that is the obvious approach, but this results in a system of polynomial equations which don't really tell much... in the 2d case these equations reduce to finding the eigenvectors of a matrix, which is a well studied problem. I was hoping for something similiar for higher dimensions to show up, but I have no idea how you would even define eigenvectors of higher dimensional arrays (and in a way that solves this problem!)

pop-sci fags are cancer

Any venture capitalists want to help found this company of the future?

We could start by selling to the military and the extremely old and desperate. Both have deep pockets.

>>7924834
fuck you, you're cancer.

Everything starts off as a concept, I see no reason why this sort of thing couldn't be done.

We've got the purpose, now we just work toward making that purpose viable in reality.

Anything you can imagine, can be made real through science.
You can quote me on that.

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>>7924734
Books, papers, caffeine, and a closed door.

>>7924734
Nicotine, caffeine, any other -ine substance. Depends on the class also. For Math, I go over everything (if there's something to derive, I do it my self because i find it provides greater insight than just reading the bottom line) then do exercises, starring ones that I will come back to before an exam if they are hard to understand.

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>>7924734
A D D E R A L
D
D
E
R
A
L

Go to your doc, get some, and sell the rest to retards for $5 or potentially $10 a pop depending on the dose

A tensor is set of quantities that obey certain transformation laws relating the bases in one generalized coordinate system to those of another and involving partial derivative sums. vectors are simple tensors.

Because of this you can think of tensors as a generalized form of vectors.

A tensor is contravariant when it transforms according to the following equation

[math]A^i=\frac{\partial y^i}{\partial x^j}B^j[/math]

Note that i and j are indcies not exponents. A tensor is covariant if it transforms according to the following equation

[math]A_i=\frac{\partial x^j}{\partial y^i}B_j[/math]

A mixed tensor is a tensor that contains both contravariant indices and covariant indices.

A tensor should be thought of as a multi linear operator that transforms (between different coordinate systems) according to certain rules (to be detailed below).

A rank 2 tensor takes two vectors as inputs. This gives it two indicies, which can be covariant, contravariant, or one of each (mixed).

Covariant index transforms by the inverse jacobian and contravariant transforms by the jacobian.

A covariant index takes a contravariant vector as its argument, and vice versa. This is because the contravariant transforms by the jacobian and the covariant transforms as the jacobian, so when they are multiplied together their transformation matrices cancel out and the result is coordinate independent.

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>tfw /sci/ has actually good answers

>>7924694

Fuck it's slanted. I'll try to fix it. BRB.

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Please work.

>>7924720

Interesting. Without wanting to come across as an arrogant twat, I'm finding it pretty easy so far and I got a G grade at GCSE. Though this time I'm actually doing the work. Shows how much of a difference a change in attitude can make.

By the way, the word polynomial isn't mentioned anywhere in the quadratics section of the textbook (which this question is supposed to test). I will have to look this up.

Assembly Line Management

>>7924673
Economics or accounting.

Data based big business degrees.

>>7924678
>Accounting
>non-STEM