Archived threads in /sci/ - Science & Math - 1678. page

>>8071873
As someone in an applied field I feel mislead in that I thought learning the field (and other "advanced" pure math fields) would make me better at mathematics in general, I invested a lot of time working for Pinter and not only were there no useful applications that aren't both simplistic and more easily solvable with unabstracted math in the sense that you can learn it on-the-fly in applied texts which is both easier and more useful. Worse still it doesn't even help you understand advanced applied math more easily. All learning abstract algebra does is to help you get better abstract algebra.


The only "advanced" math field that I actually found useful to study on its own is functional analysis. For everything else the applied textbooks teach it far better.

>>8071873
I don't really like it by itself. But I do like Algebraic Geometry, and you kinda need to know algebra to do algebraic geometry.

>>8071907
>you kinda need to know algebra to do algebraic geometry.
Nice meme.

dumb free will poster

>>8071872
>water doesn't make decisions, therefore people don't either
>i mean it's all just atoms, right?

>>8071891
Who are you quoting?

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this is now a burger meme thread

> [math]\mathbb R[/math]

>>8072867
what exactly is the point of disparaging the majority of math without any evidence that an alternative can be viable

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>>8071840
Normie Wildbooger posters really need to fuck off with all their bullshit.

no

philosophy is dead

>>8071814
Depends on your definition of "meaningful".

>>8072313
what a terrible answer

Because there is not one single thread of evidence for them. If you spend more than 10 seconds reading an article and follow their sources. Every single article that claims vaccines causes autism connects with a fraudster (aka a person who later exposed to the world that they said what they said for money) - in case you didnt know what the word meant with your 5th grade education

>>8071642
>How can we be so sure vaccines don't cause autism ?
Because we have no reason to believe they do
Besides, what in a vaccine would cause autism?

>>8071642
How can we be so sure you don't cause autism?

-1/12

>>8071439
Dammit you!

I was just googling this nonsense and I still don't get it.

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Encyclopedia Cassiopeia

Duuuh

Observing means interacting

>>8071567
No it doesn't, it means anything that leads to a subjective change in knowledge.
An electron can move through and interact with an electric field without collapsing.

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Pic related

>>8071291
holy. fuck.

>>8071291
kek.

every time

>>8070988
Why are those particular countries circled?

>>8070988
Sqrt(0.5) = 0.25
Sqrt(500) = 10 Sqrt(5)

>>8070988
Because the square root of 0.25 kg is 0.5 kg^(1/2), and the square root of 250 grams is ~15.8 grams^(1/2).

1 kg^(1/2) =/= 1000 grams^(1/2)

>>8070886
The information isn't scrambled, actually.
It's restorable unless you write new information over it.

information is the arrangement of matter and yes it can be destroyed just as it can be created

>>8070886
That's a topic of debate. The main offender are black holes. Anything they suck up gets compressed into a singularity, which by definition (presently we know, at least) does not give any information back save for hawking radiation. Hawking radiation (presently theorized) can not be used to figure out what went in. e.g. information is lost.

Now, if you were talking about something like a hard drive, no matter what you do to it, degauss it, burn it, crumble it, if you know the state of the universe and the laws of physics, you could just rewind and restore the hard drive. Black holes don't let you do that (or so it's thought).

I'm not very versed on the topic but I'm interested in it because i've been hearing a lot of discussion about information lately, as far as physics is concerned.

>>8070834
What do you mean solved? Lots of applied computer science requires us to find solutions to instances of NP-hard problems.

I'm working on some graph theory weirdness that with some more development might give rise to a general solution method for NP-hard problems, but I'm not sure if it's feasible or not yet because that's not the main focus of what I'm doing.

>>8070844
By solved I mean transofmred into a problem where a solution can be found to any instance of the problem.

For example, for the traveling salesman problem, that would be finding the lest cost path every time given the inputs we specify (such as the distance between cities, the conncections between cities, etc.)..
I'm taking the traveling salesman problem as an example because it's NP-hard (and NP-complete).

[eqn] 1 - x^4 \geq 1 - x [/eqn]
[eqn] \sqrt{1 - x^4} \geq \sqrt{1 - x} [/eqn]
[eqn] \frac{1}{\sqrt{1 - x^4}} \leq \frac{1}{\sqrt{1 - x}} [/eqn]
[eqn] \int_0^1 \frac{1}{\sqrt{1 - x^4}} dx \leq \int_0^1 \frac{1}{\sqrt{1 - x}} dx = \int_0^1 \frac{1}{\sqrt{x}} dx = 2[/eqn]

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>>8070862

>>8070910
How can i see it?

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because dumbass monkey brains have an habit of misinterpreting shit

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>>8070810
>not even knowing enough information theory to understand that no information has been transmitted

>>8070813
" any measurement of a property of a particle can be seen as acting on that particle (e.g., by collapsing a number of superposed states) and will change the original quantum property by some unknown amount; and in the case of entangled particles, such a measurement will be on the entangled system as a whole. It thus appears that one particle of an entangled pair "knows" what measurement has been performed on the other, and with what outcome, even though there is no known means for such information to be communicated between the particles, which at the time of measurement may be separated by arbitrarily large distances."
elaborate

I thought psychology was just uninformed people's talking about their observations of active neuroscience?

>>8070775
People who think it's a pseudo science don't know about the different branches.

They just associate it with the "millions of women" who get into it to help children and families.

>forensic
>neuro
>social
>cognitive
>organizational
>abnormal
>behavioral
>experimental

The concept of IQ people splerg about here was invented by a cognitive psychologist.

>>8071869
Might be a part of cognitive or neuro, but Im currently helping in undergrad research related to Senses and Human Perception.