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vzn
vzn
19:00
@zanescheepers sounds like more of a psychology question but physicists are thinking more about "simulation/ holographic universe hypothesis" lately vzn1.wordpress.com/2017/03/31/…
19:16
@Slereah No
then HE would be illegal
@Yashas We have election in 28 days here too, and it's really likely that someone like these wonderful guys win :/
Someone solve this:
What?
I hate those kind of puzzles
Because there's no real reason why it should be any of them
You need to find the pattern
19:28
well yes, but there are tons of patterns that may fit
The next number after 1,2,3,4,5 could be 17
Yeah there could be sometimes other patterns not really intended by the puzzle. But one of the answers below the box has to work too
you could have a pattern given by the homotopy groups of spheres
^as u can see here
find the right patters and you'll get a fields
1,2,3,4,5,17 is a perfectly valid series
Or 18
19:33
@Mostafa Problem is, since these puzzles do not really restrain the type of "rule" that one is looking for, one can invent rules that make all the possible solutions fit.
or 20
Yeah
Basically it all hinges on some vague notion that human intuition of some kind will find one type of solution
which gets less and less likely the harder those puzzles are
Oh man
I guess since I'm doing a chapter on the Alcubierre metric I have to talk about Harold White
@ACuriousMind What they do is that, they always start by simple patterns that somehow guide you in the right direction intended by the test.
He published a "paper" in which he wrote his name as Dr. Harold “Sonny” White
Who seriously puts Dr. in a paper's credit
Was Fallout 4 even that good?
@0celouvsky eeeeeeeeeeh
19:36
@Slereah can u send me your draft?
I played F4 twice
I think it was ok
@0celouvsky no
But I don't think it was any worse than NV or 3
They're all about the same
@Mostafa Sure, but so it's "show how well you can guess our thoughts based on what we did before" and not really a puzzle one can solve by logic alone
@Slereah One of our professors always did this..in all his emails, documents, etc. calling himself Dr. ...
19:37
@Slereah Do I get a credit?
@Mostafa my thermodynamics prof does this
@0celouvsky NV was waaaaay better storywise
@0celouvsky Sure
Though I have not yet written those
@ACuriousMind but the desert is a horrible setting for a game
Mostly it is a lot of random equations and theorems
the BoS seemed like some random cave dwellers in FNV
Why do you know have one book in the biblio?
And with the authors in the wrong order?
19:40
I am currently compiling the bibliography
I'll put them in when it's done
I put one book to check if it worked because I've been having troubles with Jabref
But it seems to work now
So this thesis uses the Kulnari-Nomizu product unironically
The wikipedia page for it seems to have the wedge misaligned
Indeed
This guy uses $\odot$
probably didn't want to fuss with the wedge
This is a pretty terrible thesis
I might have to trim the scope of the book a bit
Seems a bit broad
@ACuriousMind What do you mean by logic alone? You need to find a rule that all other elements of the matrix obey, and also works with one of the provided answers.
19:44
this is the bad kind of GR research
Believe it or not, that's one of the ways they measure someone's IQ in psychology.
@Mostafa what if it's not unique
(hint : it's never unique)
Yes but find it.
never is a strong claim
It's a strong claim that I make
For any numerical series $a_n$ such that $a_1$ through $a_k$ is defined, there are infinitely many series with $a_{k+1}$ having whatever value
Of course its complexity might differ, but complexity is machine-dependant
19:49
I'm gonna go with the square
By your logic, any of these could be the answer just like 1,1,1,1,1,5 is a perfectly valid sequence.
here's an example :
@Mostafa See, that's the problem - logically, there is nothing that forbids that. It's simply human common sense that tells you that the rule must be "they are all the same".
19:52
" Pentanacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) + a(n-5) with a(0)=a(1)=a(2)=a(3)=a(4)=1. "
Perfectly valid series
@Slereah Okay but if you that the test will give your IQ around 10 :-)
He likes wormholes, 10 is a bit generous
well then that shows you the value of such a test
Anonymous
@Mostafa Why can't it be a perfectly valid sequence ? I find these questions stupid as you are supposed to think what the test-creator thinks....and that is called "herd-mentality".
19:56
@ACuriousMind This is what they do when, for example, cracking a code in cryptography problems.
Well yes, but you see
You have to guess the rule.
That's based on assumptions of what the cryptographic algorithm is
If it's one of the common algorithm it's fine
But if you try that method with lattice cryptography or whatever weird thing
Anonymous
@Mostafa In cryptography problems you need to be far more flexible. You're comparing oranges to apples.
That won't work at all
19:58
I use one-time pads for everything
I only use the most powerful meme magic to secure my data
Anonymous
@Slereah lol, what?
Anonymous
meme magic :P
I have an algorithm in my mind that, given a keyword, generates a password. I have another rule for choosing the keyword for various websites and logins, and create my passwords this way.
That was the only way I could find so that I could have different passwords for different websites and don't forget them.
20:02
I miss the old days when you didn't have to register an account for every bloody site
@blue Then these are just simple cryptography problems.
I know how to create the perfect one time pad
only people in the know could generate the codes
you don't need a code book
I just store all data directly into my brain by rote memorization
Anonymous
@Mostafa These are nothing but stupid pattern guesses which can have mutiple correct answers but the examiner will accept only one answer :P
100% hack proof
Anonymous
20:04
I'll show you a nice crypto problem
you could be tortured or hypnotized
@blue So are cryptography problemes. You have to guess my stupid pattern that works.
not if I DESTROY THE BRAIN FIRST
Anonymous
20:08
Le Pen and Macron go for the runoff.
Anonymous
These are the type of crypto problems I like ^
Anonymous
@Mostafa Several of them work. I can give you a logic for each. But probably you won't accept my weird logic, because you have a fixed pattern in mind (and you feel that only that is correct).
@blue How do you even attack that?
@blue Yes you have to guess my logic.
20:10
When you're doing a topic as prone to cranks as weird spacetimes, you really want to have a nice presentation
This does not inspire confidence
Why is there a man inside an alien penis @Slereah ?
Anonymous
@Mostafa How on earth do I know which of the several correct logic matches with your logic? Your question gives no clue of that.
Anonymous
@BernardoMeurer Combinatorics!
@blue Show me how to solve it. I am interested
Anonymous
20:13
@BernardoMeurer It's a puzzle man. If I say it directly, then its of no use :P Try it. We can discuss it tomorrow :)
@BernardoMeurer I used to hate solution manuals when I was your age ;)
I don't like puzzles
Little math, childlike diagrams and very poor pagesetting straight out of MS Word are pretty big red flags
@Slereah I really agree with this (in a lot of contexts).
Anonymous
In cryptography, a substitution cipher is a method of encoding by which units of plaintext are replaced with ciphertext, according to a fixed system; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by performing the inverse substitution. Substitution ciphers can be compared with transposition ciphers. In a transposition cipher, the units of the plaintext are rearranged in a different and usually quite complex order, but the units themselves are left unchanged. By contrast, in a s...
20:15
Ah
Is it just a Caesar cipher?
the key is the rotation number
Anonymous
It is a Vigenere cipher
Anonymous
The Vigenère cipher is a method of encrypting alphabetic text by using a series of interwoven Caesar ciphers based on the letters of a keyword. It is a form of polyalphabetic substitution. The Vigenère (French pronunciation: ​[viʒnɛːʁ]) cipher has been reinvented many times. The method was originally described by Giovan Battista Bellaso in his 1553 book La cifra del. Sig. Giovan Battista Bellaso; however, the scheme was later misattributed to Blaise de Vigenère in the 19th century, and is now widely known as the "Vigenère cipher". Though the cipher is easy to understand and implement, for three...
Ah
There was a CS50 problem on this IIRC
YES
I finally found that paper again
Anonymous
@BernardoMeurer Sort of :)
20:17
That starts with an alien encounter
Starting your paper with "I am doing this research because I saw aliens" is probably the biggest red flag
@blue You shouldn't be able to find several patterns that can fill in the blank space with one of the provided solutions. If you could, the test is flawed.
@BernardoMeurer Yup.
@JaimeGallego Glad my brain is still operating
One time we had to do a crypto exercize by hand
I got some sleep
20:23
using letter frequency methods
It was fairly tedious
@BernardoMeurer You took the course?
@JaimeGallego I was a TF for the Brazilian version of it
I know the head TF from the Harvard course, he's a nice guy
Brazilian as well
♥ David Malan
20:26
I registered for the Cryptography 1 course (by Dan Boneh) on Coursera 4 years ago but didn't follow it for more than 2~3 weeks.
The "hacker's edition" for that problem set was a bruteforce attack on a DES key
Got a lot of enjoyment out of that
I don't like crypto stuff to be fair
I suck at it
How can that be? You are using ROT26 right now
lol ROT
@AccidentalFourierTransform yay Barca 2- 2 Real Madrid
20:34
@Mostafa oh, so that's what my neighbours were yelling about
lots of people in the streets too
"Charged Particles are Prevented from Going Faster than the Speed of Light by Light Itself: A Biophysical Cell Biologist’s Contribution to Physics"
What the hell is even that paper
@AccidentalFourierTransform Didn't you hear them yelling another time? Barca 3 :(
20:40
yes lol
so you're with RM?
I used to be but it's almost 10 years that I don't follow anything about football (or soccer? I don't know the right word)
When you text someone and then your phone begins to update
Uh, it is possible (using two transformers) to deliver more power to a resistor than the source is delivering
@AccidentalFourierTransform But when it's El Clásico, you just can't NOT get involved somehow
@AccidentalFourierTransform Life of the mods is hard and full with surprises :-)
20:43
soccer?! what are we, americans!?
football please
we're Europeans
@0celouvsky I don't think so
Ask on the EE chat
@0celouvsky Let's commercialize this idea.
I must not understand how the second transformer works here
20:46
$P_{in}=P_{out} $ is the most basic relation when working with transformers.
I know
But that's for one transformer
I don't know how the second one works
Same as the first
In reverse
be productive or be quiet
clearly that's what it's doing, but how does that work
Not accounting for losses, the power is the same on both sides
by the transitive property of equality
20:48
@0celouvsky What do you mean how does that work?
The same way all electricity works
Fucking magic mate
how does one find the power in the load resistor
and the power delivered by the source
@0celouvsky write 3 KVL equations, one in each loop.
why do I need KVL?
To find current everywhere
20:50
@AccidentalFourierTransform why are people downvoting my answer, I mentioned it is not done yet
I mean, noodle soup
people suck
there is so much to write and say
@Cows no idea, I haven't read it
actually, I cant even find it
do you mean you can't find an answer or the answer
?
I couldnt find the post
20:51
@0celouvsky actually the first loop doen't need any eqation here. You have the equivalent voltage on the secondary of the 1st transformer.
The answer is not there yet, and answer is there
but I have found it already
@Mostafa wot
you edited it
wow, a second downvote
I really dont understand why though
20:52
yeah
@AccidentalFourierTransform What ? where? I want to downvote
screw this
@Mostafa i'll downvote your looks if you downvote stuff you don't understand
@Cows Just give me the link
"Desiderata" heh, I liked that word
imma use it from now on
it's latin
20:54
@0celouvsky Why is C so controversial? It seems so logical and simple
because it is not orientable maybe
@AccidentalFourierTransform I'll show you what's not orientable
@Cows I think I'm gonna downvote it because of ACM's comment.
@Mostafa So I know that the voltage in the second loop is 1kV since the turn ratio is 10. I treated the second transformer as just a resistor. Since the turn ratio is 1/10 I get an effective resistance of (10)^2*10=1kO. So the equivalent resistance is 1010 Ohms. Thus the current in the second loop is 0.99A. It gets stepped up in the first and third loops, where it is 9.9A. So the source delivers 100*9.9=990W and the load receives 10*9.9^2=980W. Sound right?
@Mostafa look at the comment I left him first
@Mostafa you need words to talk!
20:57
@Cows I, for one, downvoted just now because you have ignored all my previous pleadings to express yourself in a coherent manner and just posted a bunch of words without any convincing connection between them.
Who gave that answer a +1 o.O
The problem is not the words you are using, it's that you are evidently using them without any technical understanding of what they mean or how they relate to each other. I've tried to read your answer twice and I have no idea at all what you are trying to say.
@ACuriousMind I am not trying to convince you of anything. The sooner you get off your high horse, the better life would be for the entire community. If you have real criticisms to make go ahead and make them. If you have an answer go ahead and write it. Otherwise shush
:P
@Cows Stop it. I agree with ACM.
I've seen no evidence you have any clue what these words mean.
@0celouvsky I don't have time to latex for free. I don't care what you think. You need to be anble to live with that.
21:01
@Cows ::shrugs:: You asked why people downvoted your answer, I answered that. If you are unwilling to consider that the fault is your way of communication rather than my "high horse", then I bid you a good day and will not attempt to educate you any further.
Lol
Why are you so hostile?
@ACuriousMind I think we both have trouble communicating. You do know I studied Physics right? Anyways may be there are better ways of saying what I have to, but you have to look for more polite ways of saying it. "Educate me" ? whaaaa
@0celouvsky Yeah, why did you say $P_{in}\neq P_{out}$ ?
lol
@Mostafa I still don't think that $P_{in}=P_{out}$ here because there is a loss
21:05
@ACuriousMind so you are saying I don't know about bianchi identities? even if I sat in a GR class? or that I can't taylor expand?
But I know what I was doing wrong
i was assuming the voltage across the third coil was 1kV
it's not
it's voltage across the 10 Ohm resistor + that coil that's 1kV
@ACuriousMind go educate yourself on politeness, and how to ask questions to people. Not how to make strong statements about people you don't know.
and that error gave me a 10,000% increase in power :P
@Cows take a chill pill
@0celouvsky yeah but $P_{out}$ should refer to total loss
@Mostafa then I agree
21:09
@Cows Take a look at this beautiful bird to calm down:
The great tit (Parus major) is a passerine bird in the tit family Paridae. It is a widespread and common species throughout Europe, the Middle East, Central and Northern Asia, and parts of North Africa where it is generally resident in any sort of woodland; most great tits do not migrate except in extremely harsh winters. Until 2005 this species was lumped with numerous other subspecies. DNA studies have shown these other subspecies to be distinctive from the great tit and these have now been separated as two distinct species, the cinereous tit of southern Asia, and the Japanese tit of East Asia...
and in fact that's what I get if I add in the power disspiated over the wires!
so all is well
@0celouvsky this sucks, a guy just sits there and says I don't know what I am talking about. He knows nothing about me, but says this
He's saying that based on many conversations with you.
And this recent main site post
@Cows ACM knows everything. Period.
OMG SO MUCH DRAMA!!! Stupid girls at school need to clam yo tits for real!!
21:11
@Mostafa he does not know me though. I've been to school, and have taken graduate courses too. I like being funny but am not stupid. In addition I have worked for some pretty epic softwware companies
yet in one sec, he decides to invalidate all of that
reducing me to a donkey and says educate me?
He is rude
He thinks he's a genius. He might know some physics, but there is are infinite oceans of knowledge.
You should stop
@0celouvsky should I delete the question all together?
I don't know
I am not going to delete it
then why did you ask me?
21:14
If I learn what a circle is, should I not call it a circle?
I don't get it
If i use the word circle, it is to save time
I cant find my gym pants anywhere
There is a reason why words are used
I guess Ill never go again
oh well
He wants to "Educate me" gosh . . . some real head shrinking is needed here
@Cows Yeah I kinda agree.
He removed still learning from his about me on chat a few days ago. @ACuriousMind
21:17
@Cows I have disengaged from this discussion and I would advise that you do so, too.
@Mostafa I have removed many things over time from my profiles - I no longer use the picture of a flaming skull, does that mean I am no longer a flaming skull? ;)
today I put some brussels sprouts into my soup
it was yummy
@ACuriousMind you're as much a flaming skull as you are Alicia Keys
@0celouvsky I fully agree.
@ACuriousMind I will, but your points should not allow you to just call people names and say anything without consequence. Let's move on but remember the events that led to this
YOU'RE A 100% FLAMING SKULL
21:19
I am deleting the question.
1
Q: Reference recommendation: QFT in arbitary dimensions $D=1+d$

fff123123When I self-study the QFT, I found that many results in textbook heavily rely on the dimension $1+3$. For example, I heard "In 3+1 dim, Majorana fermion cannot have well-defined handedness. But in dim= $2 \mod 8$ we can have Majorana-Weyl spinors." I think the spin-statistic theorem and represen...

Too broad?
but It does not remove what is in my head
Just to be clear. I am not here to prove myself to anyone!
No human is worth that!
Personally, I don't think reading stuff and writing answers, while hiding where you got them from makes you know what you are talking about. I am looking at you ACM
please stop
@Qmechanic One might think that, but given that most of QFT is dedicated to four dimensions or specific other versions, I think that asking for a reference that specifically remains agnostic about the number of dimensions is surprisingly much narrower a question than e.g. a question about references on "QFT in 4 dimensions"
@0celouvsky Why? don't you believe in freedom of speech? It's 2017
21:25
It is 2017 people
@AccidentalFourierTransform It's very similar to broccoli, right?
@AccidentalFourierTransform You linked to my question ;) <3
@Mostafa I can't relate it to the convo
At any rate, if ACM can just say I don't know what I am saying, I should be free to call him out for the fraud that he is
@ACuriousMind its a very useful question, mostly due to its answer
21:27
Since we are now in the bussiness of name calling and educating
(He probably silenced you long ago, so he can't read what you are posting. You're only wasting your time)
@Cows What about "disengage from this conversation" did you not understand? Stop flooding this chat.
(Apparently, he did not)
@AccidentalFourierTransform Oh, the answer is useful, mostly as an example :P
tikz is hard though
it took me more time to draw the diagram than to evaluate it
21:31
@ACuriousMind It is unfair to call me names and claim that I don't know what I am talking about and then try to shut me up by asking me to "disengage" because you are a mod or have many points. You spoke down at me, saying you would stop "educating" me, and that I use buzzwords. How do you talk about something without the right words? You can make me understand why I am wrong without assuming a superior status.
Heh. tikz strikes me as one of these things where the learning curve is a learning vertical slope.
I have no problem with that
@ACuriousMind lol, I cant even draw a vertical slope with it
Do you know that I have been to school?
You are aware that I have taken and passed physics exams right?
including semesters of QM
You are aware that I have taken QFT right?
why are you calling me stupid then?
tell me
Why do you think I don't know what I am talking about
?
tell me?
@ACuriousMind you need to be careful with what you say to people you don't know, especially if they are scathing
@ACuriousMind You are propagating a filthy narrative. Disengage from that.
@Cows Because your answer did not make any sense to me. The problem is not that you are using technical jargon, but that it reads more like a stream-of-consciousness than a text in which each sentence is logically connected to those around it. This is the last I'll say about it.
@AccidentalFourierTransform That...shouldn't be that hard
21:39
that is what she said
@ACuriousMind I said clearly that it was a draft. I was writing it for a while and did not want to loose what I was writing. I wanted to make some food to eat and then continue. Why can't I do that?
Then again, considering how hard "simple" things can be in LateX, it's probably the hardest thing in TikZ
@Cows Don't ask for tutorial, resource recommendations are somehow taboo here. Use latex, although your post doesn't contain any complex formulas, so it is not a problem. Ask a single question in a single post, but detail it as you can.
@AccidentalFourierTransform ::eye-roll::
yes, she did that at some point too
21:40
@ACuriousMind you could have asked something, or pinged (politely) and voice your concern anyhow you want even rudely I don't care, but not say I don't know what I am writing,
even I am rude sometimes, so I can accept some of that, but not unjustified skeptism
@Cows Your question looks like "please explain me <broad topic, general terminology, etc>". These are too broad
@Cows Start learning somewhere, you face a problem, then come here with that specific problem.
@ACuriousMind I like Asymptote too for technical drawing.
@peterh You can't see the question/answer he's talking about because he deleted it.
@paracetamol What's the joke?
@ACuriousMind Sorry, I've thought it is about this.
21:42
@peterh It is basic to a string/susy/ M-thery person. but to me it is new. Sometimes I ask these questions because I want to engage with people, and think about the,
I did not take an M theory class
or susy class
I don't know that stuff, so I am learning it, but I know basic background and math for a physics student
This is why I get excited about vocab
@Mostafa Illustrator please :-P
@Mostafa I liked ACM, but he hates my guts and thinks I am intellectual scum
@Mostafa hmm, if I ever need to do drawings, I might consider using that, thanks for the hint
I like to draw. Deal with it
@Cows SE sites are demoralizing until you don't learn the rules. After you've learned them, you will have much lesser urge to ask questions. :-(
@Cows To ask a question on a way which won't be closed, can be more hard as to answer it.
21:46
@peterh I have tried, am still trying
The graphics in this answer are created using Asymptote. physics.stackexchange.com/questions/143155/…
It also has a Feynman module for Feynman diagrams
@Mostafa nice one
yeah latexing is alright, I don't know how to draw on here
I have so much I want to say, but the time to put that stuff together, for no money or meaning to life, and the possibility of getting called intellectual scum is . . . huh
@Mostafa I will try to learn asymptote thank you
@Cows Understand what are they saying and tune your question, and following questions to reach a compromise: as you get your answer, and also fulfill all of the requirements. It is nearly always possible, but it is hard. As compensation, you will get always very high level answers from professionals.
@ACuriousMind sorry for being d**&
I put some thought into the garbage I wrote
that's all
@ACuriousMind I would still really like that education from time to time
in a polite form please
21:56
@Cows To collect reputation, questions are not enough. There are much lesser votes for questions, they give much lesser rep, and they are far more negative. And they require mostly a lot of work. To collect many rep, write a lot of answers, like a mortarboard. Regularly visit the site and if there is a new question what you can answer, be the first to answer it.
Everybody, solve this ^or you have an IQ of 35 or lower
(back to where I started tonight....)
@Cows On the PSE, professionals are mostly away on weekends, and there are much more enthusiast question. Weekends are our time. :-) Other SE sites have different behavior.

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