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12:00 AM
@heather We don't discuss individual suspensions at the request of other users. That's a matter of privacy. Read what dmckee wrote as an answer at the very question you quote.
 
@ACuriousMind, too be clear here: I couldn't post a meta post about this, but 0celo7 could?
 
the peer review system has several obvious problems:
1) Your paper is reviewed by a *tiny* number of people compared to the target audience.
2) The paper's acceptance/rejection is too permanent. If my paper is rejected by a big journal, then accepted by a rinky-dink one, and then next year gets 1,000 citations, it's still forever in the rinky-dink journal.
3) There's basically no mechanism to fix errors or improve the work after it's published.
 
Banning people over nothing for no reason with no justification, is not very helpful, I'm not chasing down authoritarians in a chatroom, you guys know what you did is beyond childish, utterly ridiculous, I mean my god...
 
@heather That is my understanding of the policy, yes.
 
@bolbteppa, please. That's not helping anyone here, and I'm all for 0celo7 coming back. I'm frustrated too. (::end counseling time::)
 
12:02 AM
Items 1 and 3 can be fixed by using public code repos with their issue trackers to collect feedback from the community. Scirate can be used as well.
 
@heather It should help
 
Item 2 is addressed by so-called "arXiv overlay journals", which essentially just publish links to arXiv papers on some recurring basis.
 
@bolbteppa, you saying it is a joke: yes. You insulting a moderator who could get 0celo7 back: no.
 
The idea is essentially "This week, we'd like to draw attention to the following set of works."
 
It is very helpful, very positive, to call out and condemn this behavior in the harshest of terms and not give it an inch, they know what they did is beyond ridiculous and unjustifiable
@heather I haven't insulted anybody, banning someone over nothing is beyond childish, that is not an insult, it's a fact, it's a chatroom, don't appease ridiculous authoritarian policies...
 
12:04 AM
@bolbteppa Uh, no, they don't. If "they" agreed with you they wouldn't have done whatever it is you're upset about.
 
@DanielSank 3) is totally true, I've seen horrendous stuff that somehow (right names/whatever ...) made it through peer-review. 2) is kinda debatable, especially as at least I've had the feeling in my case that I'd know a number of halfway decent journals I would attempt before giving up ... 1) would be ok if the reviewers had some qualification that would single them out for that task and if they had enough time (which I claim is the reason why overlooked errors are such a big issue)
 
You're being rather ridiculous.
 
@bolbteppa, you can call me childish, I am a child (ahem, teenager) but calling an adult childish is generally an insult. Besides, even if it was okay, that's not going to help us any. I'd rather keep my mouth shut when I'd rather not and get the outcome I want then yell at someone so I feel better but not get what I want.
 
@DanielSank there's the issue that the usage/popularity of arXiv varies greatly, to my experience, across the different fields
 
@Sanya The idea of overlay journals is to use arXiv for what it is: a file server.
 
12:06 AM
Whatever your personal opinion is, this chatroom is not the place to discuss the suspension. We do not discuss specific suspensions in public without explicit consent and participation of the user in question, so everyone please drop the topic.
 
And nothing more.
 
@0celo7, please post this to meta so we can take care of this.
@ACuriousMind, okay.
Thanks for the policy clarification btw.
 
Soooo, anyone got any jokes?
I got one.
 
@DanielSank Only one?
It better be good, then
 
So this doctor is giving a lecture in a medical school orthopedics class. He's talking about how one bone connects to another at a right angle. This one student raises her hand and asks "Isn't that kind of orthonormal thinking?"
::crickets::
That's the best pun I've ever come up with. It's all I got.
 
12:10 AM
Nov 13 '15 at 1:52, by DanielSank
A doctor was lecturing to his med school class about the skeleton. He came to the shoulder blade and noted that it articulates with the arm bone at a right angle. A student raised his hand and said "isn't that awfully orthonormal thinking?"
 
Well, that was fast.
 
Sorry, heard it before ;)
 
Awww dangit.
::leaves the stage::
::Pushes @ACuriousMind onto stage::
 
Soo...why did Cauchy take so long to walk his dog?
2
Because he left a residue at every pole.
 
::Throws cabbage::
 
12:13 AM
::makes sauerkraut::
 
Utterly shameful...
 
Newton and Einstein are playing hide and seek. Einstein is counting, 1,2,3 ... when he reaches 100, he turns around and sees Newton standing behind him. Einstein is like "But Newton, what are you doing, you are supposed to hide?" Newton points to the square he drew onto the floor with chalk: "I'm not Newton, I'm Pascal!"
 
::asks for some sauerkraut::
@Sanya ?
 
@DanielSank Newton/square (meter)?
 
@Sanya lol, I think that doesn't work for Americans with their weird units ;)
 
12:14 AM
I get @DanielSank's pun but no one else
 
@Sanya Ah.
 
@ACuriousMind that's why SI is better ...
 
@DanielSank Sorry, that takes a few weeks
 
@ACuriousMind, no, your units are weird, ours are perfectly normal! (::coughs ashamed-ly::)
 
@ACuriousMind Eh? We use SI.
It's the Brits who use their weird-ass units like "stone".
 
12:15 AM
^
 
mile, gallon, pound, cup? :o
 
yeah, perfectly normal =P
 
and so useful
 
yes
 
not to mention inch and feet
 
12:16 AM
Well, ok...
Yes, we use silly units for certain things (like the Brits).
Road distances are in miles, feet, etc.
Not in science though.
 
is it true that to convert square inch into square feet, the easiest way is to convert to from square inch to m² and then to square feet?
 
...unless your're building mechanical parts, in which case the screws etc. are imperial (i.e. from the Brits, i.e. it's all the Brits' fault!).
Paging @JohnRennie to atone for the sins of his Nation/Empire.
@Sanya What? No, that's ridiculous.
12 inches = 1 foot.
You know, realistically, the Imperial system is better.
12 has a lot of factors, 10 does not.
12 would be a better base system.
 
indeed
 
@DanielSank The Babylonians got it better with 60, IIRC.
 
Unfortunately, we have ten fingers.
@HDE226868 Seems a bit high for a base, but w/e.
 
12:19 AM
well, then let's change our number system :o
 
@DanielSank True, and I don't often need to divide things into fifteenths.
 
@HDE226868, I honestly hate having different systems for time and everything else. So...no to the Babylonians.
 
I like that 12 is divisible by 1, 2, 3, 4, 6.
That's a huge fraction of factors.
 
@heather It would at least fit with the 60 seconds in a minute, and 60 minutes in an hour.
 
For 10 we have 1, 2, 5.
 
12:20 AM
But it's pretty unwieldy, I'll agree.
 
well
 
@HDE226868, exactly, I don't like that system.
 
Quick, someone plot fraction of numbers smaller than x which are factors of x versus x for x from say 1 to a million.
 
I made a perfect score on our mechanics midterm up to the point where I realized I wouldn't finish before the class ended
 
@heather now's your time to use python for great good.
 
12:21 AM
@DanielSank, okay, I'll do it!
=D
 
@DanielSank perfect job for mathematica because it has probably everything built-in :p
 
@Sanya heh
 
@Sanya, now that is no fun
 
@heather it does yield quick results if you need them
which is argueably an advantage
 
@Sanya, shh, not important
=P
 
12:23 AM
@Sanya Mathematica is great. Let there be no mistake.
 
Have any of you seen/used these Preskill quantum information notes? theory.caltech.edu/~preskill/ph219/chap2_15.pdf
 
@DanielSank except for when after a week of calculation time in Mathematica you think that you should have written a decent program
 
our class has abandoned Sakurai and Shankar for them
at least for now
 
@Sanya Well...
 
almost finished the code...
 
12:32 AM
Me too. It's a race!
 
oh dear
package not supported. curses
 
> for i in range(1, 1000001):
> read my mind
> do what I want
 
@heather heehee
 
alright, my night ends in 5 hours, I'd better get some sleep
ping me with the results @DanielSank @heather :D
 
wait, no mistype
ergh, different error
 
12:36 AM
cool
 
@Sanya, good night
 
@heather shall I post or would that discourage you from finishing?
 
@DanielSank, go ahead and post =)
I'll keep working
 
@Sanya
 
darn, new error
 
12:39 AM
Actually, that point at X=1 shouldn't be in my plot...
 
10^3 isn't a million; can't fool me
;)
 
@GPhys Eh?
 
"Quick, someone plot fraction of numbers smaller than x which are factors of x versus x for x from say 1 to a million."
 
oh
one sec
 
wait, @DanielSank, does reduce not work in py3?
 
12:41 AM
@heather Because Guido hates functional programming.
 
@DanielSank, it doesn't? (::googles frantically::)
 
@heather Oh sorry.
I thought you asked why it doesn't, so I assumed it doesn't and was giving a reason XD
 
@DanielSank, oh, okay. Hmm, replacement function...
 
Ahh, dangit, my code is slow.
There's one with gridlines etc.
 
@DanielSank what language?
 
12:44 AM
I'm not going to figure out how to make this work up to a million right now (or probably ever).
@GPhys Python (with numpy).
 
we are required to use python for computational physics class
 
I'm looking for factors in the dumbest possible way, so it's super slow.
 
(first semester PhD class)
 
@DanielSank, sorry, would you mind looking at my code and telling me what's wrong? I'm uploading it to github now...
 
I use numpy for everything, but it's still not ideal
 
12:45 AM
@GPhys Numpy is awesome.
There really ought to be similar libs in statically typed languages.
 
@DanielSank Sure, but even fully numpy vectorized functions are still some orders of magnitude slower than C
which begins to hurt when my program starts to run for ten minutes
 
I know why there aren't (at least I think I do): it's because you don't know the shapes of your arrays statically, no it's hard to make a type system that is safe w.r.t. the array shapes.
But I don't understand why we don't have libs that just box-type the arrays.
 
it is here @DanielSank
 
but it's not as big of a deal as it would be in practice
 
with error as well
 
12:46 AM
@heather Wow, you're really learned some python there!
 
normally I wouldn't be programming linear algebra functions in Python (we aren't supposed to load libraries)
 
@GPhys Uh... really? They shouldn't be. Numpy is just running compiled C.
Are you sure you're not accidentally dropping back into the interpreter?
 
@DanielSank I'm completely certain; and this is well known
I think most of the overhead is typing
or something
 
@GPhys typing?
 
(and so it can be eliminated with Cython)
 
12:48 AM
wat?
 
@DanielSank, more like I'm writing code plus finding stack overflow answers and putting it all together with fingers crossed =)
 
as in, the variable types aren't declared in Python (I don't know the programming lingo for it?)
 
though i do understand pretty much all of it
 
I was told it's extremely slow by somebody who I trust knows more about it than me, though
but even then I've always been told it's faster to even just rewrite the entire thing in Cython than to use numpy
 
@GPhys Dude, the whole point of numpy is that it's not running in the python interpreter at all.
When people say stuff like that, you should always be very skeptical that they have any idea what they're talking about.
People say "XYZ" is slow. Ok, in what conditions is it slow?
 
12:52 AM
is there anything obviously wrong with it? I looked through it a couple times, and I can't seem to find anything...
 
You can say writing stuff in Cython is faster than regular python, and that's true if you're writing code where Cython can help.
 
@DanielSank Wait, are you claiming it's not slower?
 
@GPhys I'm claiming that unqualified statements about slowness are stupid and should be avoided.
Yes, Cython will often speed things up.
 
I thought we made a fairly specific statement about functions vectorized with numpy
 
Oh!
 
12:54 AM
that is, that rewriting the loop in Cython is typically faster
 
I didn't realize you were talking about that.
 
sorry if I was unclear
 
Yes, vectorizing a python function is definitely not going to run very fast.
 
although it's often not worth it to invest the time to do so unless said function is going to be performance limited in the first place
 
12:55 AM
@ACuriousMind, okay..what does it mean for a title to be clickbait-y?
 
@GPhys My opinion: If you need better performance in a numerical routine than you can get out of numpy, you should probably write your routine in C and use Ctypes to call it from python.
@heather It means the title makes people want to click because of unavoidable human impulses, but not because it's actually a good post.
 
@DanielSank Probably; I'm certainly more comfortable in C than Cython anyway
 
Like, if I were to make a post "Google Builds First Working Quantum Computer!!!11" for a post about a two-qubit experiment, that would be click-bait.
 
all the times in this computational physics class I've needed better performance are cases where I would have used fast libraries in the real world anyway though
 
@GPhys Numpy is pretty darn fast...
I wonder if there's an easy way to write your own ufuncs for numpy...
 
12:57 AM
@DanielSank, ah, okay. Yeah, I clicked through =P
 
@DanielSank It would have been faster if my first numpy attempt didn't run me out of my 16 GB of RAM
 
normally I just automatically get ufuncs by only using numpy functions in my function
normally
 
ran out of steam with the python program, can't figure out this error =(
 
sometimes I have to be careful about my array casting though
 
12:59 AM
@heather Do U want help?
 
and occasionally I have to try/except the array/scalar version
 
@DanielSank, sure, if you don't mind...code is here
 
if you really just want a vectorized function numpy has the vectorize function to automagically turn a function into a ufunc but it's obscenely slow
obscenely slow
so slow it's unusable (when I want to use it Q_Q )
 
@heather Woah, dat factors function...
@GPhys yeah, don't use that.
 
I finally realized that instead of using try/except statements to split out the array and scalar versions in a ufunc I"m writing I can just multiply by a boolean (0/1) as an array-friendly if/then
 
1:02 AM
@DanielSank yeah...kudos to this q/a; I can't take credit for that function
 
@heather yeah....
 
@DanielSank, is something really wrong with it?
 
So... complicated lines of code like that are often not a great idea, especially if you don't know what they're doing.
 
@DanielSank, okay, maybe I'll rewrite that =)
 
It's making a tuple of lists.
And then feeding them into set().
 
1:04 AM
a...er...I'll just rewrite the function.
 
@DanielSank stares at the adaptive RK4 nth order symplectic ODE solver I wrote for my last homework
cosmic scale numerical simulations work better when you don't try to use SI units for your numerical computations
I learned
err, the verlet was symplectic, not the RK4*
 
@heather I emailed you my code just so you have a reference of "standard" looking python.
 
@DanielSank, okay, thank you!
 
user218912
@SirCumference hi
 
Hi
 
1:10 AM
@DanielSank, okay, now the factor function is working but there's a new error (sorry to bother you)
 
@heather same link?
 
@DanielSank, yep
 
@obe Howdy
 
Try import matplotlib.pyplot as plt and then plt.scatter
 
okay
there's a new error, about there being no such file/directory...maybe I'll just plot using a different package, as this one is being difficult
 
1:15 AM
@heather What's the error text?
 
@HDE226868, see this, gives error and code
 
Huh. Are you sure you installed the package correctly?
 
@HDE226868, see, that's the thing, I'm using an online compiler, repl.it, that says it supports all python packages
 
user218912
@SirCumference what r u up to
 
@heather Ah. I have no experience with that.
 
1:18 AM
@heather Apparently it does not.
At some point, ask your dad to show you how to set up python on your computer?
Or @BernardMeurer or I can help.
It's pretty easy.
What OS are you using?
(Say Linux, say Linux...)
(or even Windows)
 
@DanielSank Oy, Python works just fine on Windows! :-)
Well, it has its limitations.
 
@HDE226868 Have fun with virtualenvs...
They work, it's just not quite as nice as on Linux.
 
@DanielSank I'm already planning on installing Ubuntu as a dual-boot system; I'll try to avoid those.
 
@HDE226868 Woah no no no no no.
Virtualenv is a magical happy land for python.
 
. . . . .
 
1:22 AM
It lets you install python packages in isolated environments so that you don't have to worry about clobbering your system python or about having conflicting versions of various packages.
 
Ah, so if I had code written in, say, 2.x but usually use 3.5, I could run the 2.x code using a virtualenv?
(As a simple example)
That would be nice.
 
Yes, you can use whichever version of the python interpreter you want for each virtualenv.
Using python without virtualenvs is the path to Sadness.
 
@DanielSank I feel a great calm descending over me now. I can't believe I hadn't heard of this before.
Thanks.
 
Hang on, I'll link you to my Google Doc explaining how to use it.
 
@DanielSank Awesome. Thank you.
 
1:30 AM
@HDE226868 Sure. It makes life so much better.
 
@DanielSank, um...chromebook. So, neither. =(
 
@heather That's more or less linux.
I think @BernardMeurer can help you get to the Linuxy parts.
 
Chromebook runs a Gentoo fork I think
or Chrome OS I should say
 
@DanielSank, okay, so ask @BernardMeurer?
 
Well, a lot of Chromebook users do this.
But yeah, Bernardo can probably help.
 
1:38 AM
@DanielSank dang
I wonder how much the Chrome OS team crippled portage for that to be necessary
 
okay, which is better @DanielSank? because I can figure the 1st one out
 
@obe Programming
Anyone know JS?
 
@SirCumference, a bit
not much, though
 
@heather 1st one what?
 
the link or what Bernardo will help me do?
 
1:41 AM
@ACuriousMind How could he choose?
He's banned, he can't talk
 
@SirCumference, only on chat
 
@heather So how else would he talk?
 
@SirCumference, meta
 
@HDE226868 You might like this
Annoys so many chemists
 
2:22 AM
Hahahaha
 
user228700
Hi everyone :-)
 
@Kaumudi, hello
@BernardMeurer, my mom just said I could set up Python on my computer =D
 
@heather But how? You're running ChromeOS
 
DanielSank said I should follow the instructions at this site and then you'd help me, unless I misunderstood...
 
Are you going to follow my path and become a madman madwoman trying to get linux to run on everything?
Ah yes, come to the dark penguin side
 
2:32 AM
@BernardMeurer =D fyi, this will be my first time really using linux, though I have had a little experience (i.e., looking over my dad's shoulder, typing a few things for him)
should be fabulous!
so do I use the link?
 
@heather Let me take a look at it
*through look
 
okay, thank you - I'm excited =D
 
@heather ANYTHING you need help with Linux talk to me
ANYTHING
You can call me, smoke signal me, telegram me, morse code me, scream loudly
I will come to help a Linux newbie
 
::begins gathering firewood for smoke signals. just in case::
It may be the only means of communication left when the potato army attacks
 
=D =D penguins!
I will communicate via potato computers =P
oh, wait, you forgot messenger pigeon =P
 
2:36 AM
@heather That's the spirit!
@heather I hate pigeons, they're basically winged hobos
 
@BernardMeurer, okay, no pigeons =)
 
This seems more up to date :)
 
@BernardMeurer, okay, follow those instructions?
 
For now yes, give me 5 minutes
I'm asking people on the ARM IRC chat
 
okay, not doing anything just now
 
2:51 AM
@heather Okay, no one knows nothing, and the ARM channel is dead at this time
Greenlight on that article
 
@Mew wrote if QFT is true, it will be understandable in a non-mathematical way -- let's try this one on for size: if MATH is true, it will be understandable in a non-mathematical way.
 
3:16 AM
I'd like to state that @0celo7 Is a good person, and a good addition to the h-bar
3
Hm-hrmm, @ACuriousMind
 
user218912
3:45 AM
@Obliv
 
user218912
 
@0celo7 You should look at the star wall, we're fighting for ya
 
user228700
Guys, exactly what does this quote mean:
 
user228700
> "The Calculus required continuity, and continuity was supposed to require the infinitely little; but nobody could discover what the infinitely little might be."
 
vzn
re 0celo7, sorry/ disappointed to see him blocked, however not the 1st time, 90d seems like a long time, like others wonder what offense merited that. do have one suggestion. doesnt anyone have his skype addr? would suggest he try some other (nonSE) chat room or communication system eg skype, IRC or facebook etc, and have a cohort post his contact info in here for anyone who wishes to contact him. actually he can do that on his SE profile also...
 
3:59 AM
5 messages deleted
 
user218912
inb4 bernard is flag banned for 30 mins.
 
user218912
oh
 
@ACuriousMind ;-;
Can't we just joke around?
 
Also, to the mods, it has become clear over the past few weeks that you are forwarding an agenda of sanitizing the h Bar, trying to turn this into some form of "safe space". Your efforts are deforming this chatroom, and making it worse, not better. I don't know when did you folks start getting so triggered about everything, but it's time to stop. Please go back to moderating as usual and be reasonable human beings.
 
@BernardMeurer A bit too harsh, but I have to agree with your point
 
4:01 AM
@SirCumference I'm tired of this bullshit
 
@Kaumudi The "infinitely little" is what we usually called an "infinitesimal". The quote intends to say that Newton's original calculus required the notion of the ratio of "infinitely small things", but when continuity (and therefore calculus) was finally formalized by mathematicians centuries later, no such infinitesimal was defined or needed.
 
@BernardMeurer You sure he wants you posting that in a public chat?
 
user218912
prob not
 
@SirCumference Yes
Goodnight folks
 
@BernardMeurer 0_o
 
user218912
4:02 AM
@BernardMeurer can you spell?
 
Bit too far
 
@Kaumudi (contd.) The infintesimals returned in modern times in a variant approach to analysis called non-standard analysis
 
@obe What's 0celo's name supposed to mean?
I assumed it was based on Shakespeare's play "Othello"
 
user218912
no it's revolver ocelot from metal gear.
 
@obe I know, I just made it into a stupid joke.
 
user218912
4:05 AM
it was unclear that you knew based off what you just said but ok.
 
@obe I've heard at least
Though he said that wasn't it, didn't he?
Oct 10 at 2:21, by 0celo7
Wrong.
 
user218912
he was joking, I think.
 
user228700
@ACuriousMind Hm, OK, thank you :-) (I will check it out)
 
user218912
xD
 
@Kaumudi Be warned that non-standard analysis is exactly that: Non-standard. Most people will not work in the framework with infinitesimals when doing calculus/analysis.
 
user228700
4:20 AM
I don't really understand that ^ but OK, it's not important at the moment. Thanks :-)
 
Oye, I need someone to confirm something
Can I prove $f(x) = g(x)$ by confirming that $f(0) = g(0)$, and by confirming that every derivative for both functions at 0 are equal?
 
@SirCumference No, that only works if both are analytic functions (i.e. equal to their Taylor series at 0 everywhere).
 
@ACuriousMind Oh, now I realize I'm an idiot
 
There's that famous $\exp(-1/x^2)$-like function that has all derivatives equal to 0.
 
@SirCumference I feel like there's a name for this...
Like a theorem
I don't remember the name though
 
4:35 AM
@SirCumference There is the identity theorem for holomorphic functions, although it states something slightly different.
 
@ACuriousMind Our astro prof proved $e^{ix} = \cos(x) + i \sin(x)$ using that "theorem" I just described
 
@SirCumference As I said, that works if both functions are analytic, because then they're equal to their Taylor series, and showing all derivatives are equal shows their Taylor series are equal
 
@ACuriousMind Yep
Makes sense
 
user218912
5:03 AM
@ACuriousMind shouldn't you be asleep?
 
user228700
6:09 AM
Hello again. Is anybody interested to discuss about indeterminate forms of limits?
 
user228700
6:20 AM
Nvm :-P
 
6:43 AM
I don't even know what indeterminate forms of limits means :-)
 
 
1 hour later…
Mew
7:51 AM
hi
 

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