Archived threads in /sci/ - Science & Math - 2120. page

>>7690942
yes
http://lesswrong.com/lw/qp/timeless_physics/

>>7690942
>Hey, i was just wondering, time is define by mouvement.
Nope, it's often measured by movement, but your claim is like saying I don't have height if I don't have a ruler.

>>7691197
not OP, but thanks for the site, it's pretty neat

>>7690908
>USA
>Accomplishing anything of value

>>7690908
Taxes

How would the discovery of the Higgs boson have accelerated scientific progress?

He's a fucking dipshit. Consciousness plainly exists. Some people equate consciousness with something like a soul, so he's probably attacking that straw man

>>7690905
Def A: Deterministic: unique solution to an initial value problem of a dynamical system
Def B: Universal Initial Value Problem: a system of differential equations and initial values that uniquely describes the universe
Def C: Free Will: some factor that allows for non-unique solutions to the universal initial value problem
Axiom A: the universe is deterministic
Lemma A: The universe is uniquely determined for all points in time: this follows from the definition of determinism
Def D: Consciousness is the state of possessing Free Will, i.e. Free Will exists in a system
Proof by Contradiction: Assume consciousness exists. Thus, Free Will implies that the Universal IVP may have multiple valid solutions. This contradicts Axiom A. Therefore, Consciousness does not exist. Ergo, it is an 'illusion' in the sense that some people believe it exists due to experience.

>it's just neurons lmfao

Fantastic theory.

Because if something isn't falsifiable it can't be tested scientifically. If under no circumstances can your hypothesis be proven wrong, then it makes no concrete predictions, and therefore isn't science.

Some examples of such pseudoscience is psychoanalysis. It tries to explain some behaviors as suppressed subconscious urges which are denied by the person. As there's no way to possibly design an experiment where the psychoanalytic approach would be proven wrong (as every result would be interpreted as either the manifestation of the urge or its denial), psychoanalytic approach is not science. It's pseudo-science.

>>7690901
>why falsifiability is important and mandatory

It isn't. Stop reading popsci faggot

>>7691050
Idiot social science retard detected

>>7690889
They say both Godel and Cantor were crazy, though not officially diagnosed with anything both of them spent time in mental hospitals and you know Godel starved himself to death so that's gotta be some kind of insanity.

>>7690889
John Nash

>>7690897
This

>>7690816
A. My justification even though you didn't ask for it? It's blue, the favorite color. No context was given, either. I wasn't told of a prize or an item to receive.

Best case scenario I gain riches, worst case scenario I get a free door or nothing at all. Or I guess there could be somebody with a gun behind there instructed to fire at me.

Anyways. WHATS BEHIND THE BLUE DOOR FAGGOT

>>7690821
You opened the gates of hell. Game over.

>>7690816

I'd punch the fucker in the face and open all three.

>/biz/ checking in

>>7690809

P = NP postulates that there are no non linear functions that require an exponential amount of iterations given the input that can't be reduced to non linear functions that only require a polynomial number of iterations for the same task.

It's a meme.

Let n = 1
P(1) = P
NP=P
P=NP

>implying modern science isn't stuck too far up it's own ass for intuition

>>7690807
They actually make you smarter, not even joking.

>>7690807

they are very calming.

>>7690817
scientize that claim por favor

The only positive I've ever heard is weight loss and shorter life span

File: goblin.jpg (81KB, 640x640px) Image search: [Google]

81KB, 640x640px

>math is babby's first probability

>>7690806
She looks like a giraffe when she takes a bit out of that burger. I think I'm in love.

>>7690790
>engineer looks like he's about to suck some cocks
>mathematician has that smile when you're complete out of touch with reality(looks like he just smoked some weed)
>philosopher looks alpha as fuck

Pretty accurate.

>>7690666
When was this? For some reason, I don't remember this scene, are you trying to bait /sci/ again?

>>7690672
>In the book

File: Screenshot from 2015-11-30 22-24-41.png (55KB, 310x165px) Image search: [Google]

55KB, 310x165px

WITNESSED

>>7690660

Doesn't matter. They didn't have Christian values and squandered their discoveries by keeping it to themselves.

>>7690700
They're still the earliest discoverers

>>7690700
>Christian values

lel, b8, but it it's true if you replace "Christian" with "Enlightenment"

Nice homework blog

>>7690639
Anon, it really isn't my homework. This problem came out of my 9th grade sisters notebook and I'm
frustrated that I cant even solve it, pls help.

>>7690635
that pic though,
way to complicate the simplest multiplication ever.

>>7690585
do you even get it, pleb ?

>>7690585
>how do you guys make math interesting

I don't know, sometimes i just view as a game.

>>7690585
Mild autism.

No really. The pleasure of math is somewhere between a really complicated puzzle where all the pieces click into place once you solved it, or like an OCD person who will only feel comfort once he clicks the right and left sides of his mouth with his tongue just the right number of times.

>>7690475
Homework goes on >>>/hm/

Also,
>decent
> not descent

>>7690475
*descent

>>7690478
its not homework.

we decoded it on the very first try! let’s try a harder one.

encrypted message:
tgtlgsdauwewkksywjwuawnwvoaddfglsuloalzgmlafxgjeslagfozqgjsfywbmauw

frequency count:
8 - w
7 - ag
6 - l
5 - s
4 - fu
etc

Our first guess should be to substitute ‘w’ with ‘e’ (rot8), since it’s the highest count.

bobtoalicemessagerecievedwillnotactwithoutinformationwhyorangejuice
with spaces:
bob to alice message recieved will not act without information why orange juice

So, how would you go about making it more difficult to find patterns in the frequency count? The next step up from a rotation cipher is a ‘polyalphabetic cipher’. Here’s how it works.

First, you come up with a codeword, known by both alice and bob. Let’s say the codeword is “boner”.

Converted to number values, this word is:
"2 15 14 5 18"

Now, we take the message we want to encrypt. Let’s say:
"bobtoaliceacknowledgedwillinvest"

You convert it to numbers:
"2 15 2 20 15 1 12 9 3 5 1 3 11 14 15 23 12 5 4 7 5 4 23 9 12 12 9 14 22 5 19 20"

Now, you go through the codeword, which is called the “key”, and repeatedly add the values of the codeword to the value of the letter, like so:

"b+b o+o b+n t+e o+r a+b l+o i+n c+e e+r a+b c+o k+n n+e o+r w+b l+o e+n d+e g+r e+b d+o w+n i+e l+r l+b i+o n+n v+e e+r s+b t+o"

"2+2 15+15 2+14 20+5 15+18 1+2 12+15 9+14 3+5 5+18 1+2 3+15 11+14 14+5 15+18 23+2 12+15 5+14 4+5 7+18 5+2 4+15 23+14 9+5 12+18 12+2 9+15 14+14 22+5 5+18 19+2 20+15"

"4 30 16 25 33 3 27 23 8 23 3 18 25 29 33 25 27 19 9 25 7 19 37 14 30 14 24 28 27 23 21 35"

subtract 26 from all numbers >26:
"4 4 16 25 7 3 1 23 8 23 3 18 25 3 7 25 1 19 9 25 7 19 11 14 4 14 24 2 1 23 21 9"

turn into letters:

"d d p y g c a w h w c r y c g y a s i y g s k n d n x b a w u i"

so the encrypted message is:
ddpygcawhwcrycgyasiygskndnxbawui

This is quite unusual; the variances in frequency are flattened out. This would tell us, after testing ‘y = e’, that we probably aren’t dealing with a rotation cipher.

The reason this cipher is called ‘polyalphabetic’ is because it uses n alphabets, where n is the number of characters in the ‘codeword’ or ‘key’. In the case of the previous post, there were five alphabets: one used for characters encoded with ‘b’, one for ‘o’, one for ‘n’, one for ‘e’, and one for ‘r’.

How do we use this to attack the cipher? Well, if we suspect we’re dealing with a polyalphabetic cipher, the first thing we do is try to guess at the number of characters in the key. Let’s say we assume there are four. We would divide up the message into characters encrypted by the first character in the key, encrypted by the second character in the key, the third, and the fourth.

the first character (d) in the message was encrypted by the first character in the key. The second (d) by the second, the third (p) by the third, the fourth (y) by the fourth, but the *fifth* character in the message was encrypted by the *first* character in the key (if we’re right about the length.key=4)

So let’s divide the message up into four parts. Every fourth character starting with the first character goes in one pile, every fourth character starting with the second character goes into another pile, etc.

ddpygcawhwcrycgyasiygskndnxbawui
d1 d2 p3 y4 g1 c2 a3 w4 h1 w2 c3 r4 y1 c2 g3 y4 a1 s2 k3 n4 d1 n2 x3 b4 a1 w2 u3 i4
characters encrypted with first key character: dghyagda
characters encrypted with second key character: dcwcssnw
characters encrypted with third key character: pacgikxu
characters encrypt with fourth key character: ywryynbi

Now we have four individual ‘messages’, each of which is encoded using its own rotation cipher.

We do frequency counts on each of the individual alphabets: