The h Bar

user253310

7:00 PM

Pentanone in itself makes no sense

user253310

You should tell where the carbonyl lies @ArmaGeddON

Swapnil Das

@ArmaGeddON Why?

user253310

At which number carbon

Swapnil Das

@ArmaGeddON Never gave attention to MAT. Once I gave, it went to be one of the best :)

ArmaGeddON

"carbonyl" plz class 10 standard, never even heard that

btw suppose its pentane with ketone functional group

Swapnil Das

7:02 PM

All chem is greek to me :P

user253310

Pentanone

Pentanone may refer to the following ketones containing five carbon atoms: 2-Pentanone (Methyl propyl ketone, MPK) 3-Methyl-2-butanone (Methyl isopropyl ketone, MIPK) 3-Pentanone (Diethyl ketone, DEK) == See also == Cyclopentanone...

user253310

@SwapnilDas Chemistry is the most important subject in JEE ...fyi....

Swapnil Das

Idc. I'll study from 11th.

ArmaGeddON

Swapnil

Das

buddy

Swapnil Das

Bro don't consume so many sentences :P

dmckee

7:04 PM

@BernardoMeurer There were things from my introductory chemistry class that didn't gel for me until I learned a bunch of atomic physics in a spectroscopy lab in grad school.

ArmaGeddON

even revise IX and X class chemistry before proceeding to XI if u really don't find it interesting

Swapnil Das

Yes sure :)

dmckee

But then I managed to spill strong acids on my skin five (5, damnit!) times in intro chem lab, too, so it's just as well I wasn't interested in continuing.

ArmaGeddON

first Chemistry was like rubbish for me but since i started understanding it, it became quite interesting

Swapnil Das

I hate experiments :P

ArmaGeddON

7:05 PM

btw i reffered to 2-Pentanone

dmckee

@ArmaGeddON Yeah, it's all much more interesting since I understood why they were going on about all that tripe.

ArmaGeddON

Swapnil are u preparing for FTRE too?

Swapnil Das

No bro.

I want a deep sleep on 25th dec, actually.

@dmckee I don't find a charm in it, actually.

user253310

@SwapnilDas Soon you will. Just wait till 11 th :) Mechanisms in organic chemistry need even more creativity than calculus :P

AccidentalFourierTransform

oh no i ran out of coffee

ArmaGeddON

7:09 PM

I've been revising PCM from FA1 to till date non-stop, just get up to eat food, average sleeping time 3:00 am, asking problems on chatrooms, doing everything possible my life sucks, now ask me how m i still alive

Swapnil Das

@AccidentalFourierTransform RIP to Coffee. (Return if possible)

AccidentalFourierTransform

fml

Swapnil Das

for my living? (guessing)

AccidentalFourierTransform

idk smh

ArmaGeddON

my neighbor has open 4G Jio and i am download games non-stop

downloading *

user253310

7:10 PM

@ArmaGeddON Be prepared to do that for the next two years :D

ArmaGeddON

that scares me dora

Swapnil Das

@ArmaGeddON You should enjoy that.

ArmaGeddON

enjoying B)

i've used 3 UBS extension chords to receive signals :p

Swapnil Das

:P

ArmaGeddON

dora?

user253310

7:12 PM

@ArmaGeddON yes?

ArmaGeddON

what was your % in XII?

user253310

@ArmaGeddON I haven't given 12 th till now :P

ArmaGeddON

ok

user253310

Board exams are in March or April

Swapnil Das

Now don't ask me my 10th percentage lol

ArmaGeddON

7:13 PM

i thought u have dropped for jee

user253310

@ArmaGeddON What made you think so?

Swapnil Das

No he's smart :)

ArmaGeddON

yh, seems so :)

i wasted my life in 3 parts

Swapnil Das

Ready to listen how.

ArmaGeddON

1st Programming
2nd Hacking
3rd Clash of Clas

Clans*

Swapnil Das

7:15 PM

Sad.

Difficult to get over addictions, actually.

I also have some.

ArmaGeddON

but i learnt something for each
Programming - Learn how to wake till morning
Hacking - Keep Calm
Clash of clans - uhh never mind :p

Swapnil Das

Hmm.

Just kick out these stuff after 10th.

They'll kill your time like anything.

ArmaGeddON

all kicked since a month :(

Swapnil Das

Oh!

Great then.

For waking till morning, try Irodov.

ArmaGeddON

Irodov?

Swapnil Das

7:18 PM

Yes, just a book of physics problems.

user253310

@ArmaGeddON Ignore that suggestion :P

ArmaGeddON

Resident Evil 6 downloading complete

Swapnil Das

@Doraemonドラえもん Lol. Why?

ArmaGeddON

Elder scrolls 4 on downloading :p

just googled irodov, he looks scary

i would rather stay away :P

Swapnil Das

Man it is a good book.

Solve one question everyday you'll get fairer skin lol @Doraemonドラえもん

user253310

7:20 PM

@SwapnilDas Experience says that Irodov is simply a waste of time for 11th graders...in 11th anyway you have a lot of Physics to learn.

Swapnil Das

That's why recommending in 10th bhai :P

user253310

You guys will be 11th in a few months :)

Swapnil Das

3 months can be at least 3 sections of Irodov.

(If you solve like a snail)

user253310

Well, you can go ahead if you wish. I was just giving my suggestion :)

ArmaGeddON

i was actually very confident about my trigonometry, fiitjee ke module khole, aukat pata lag gai :p suggest me how to prepare trig. for FTRE

Swapnil Das

7:22 PM

@Doraemonドラえもん Which is valuable :)

@ArmaGeddON You have reference books?

ArmaGeddON

i wish i had R.D. but too expensive

Swapnil Das

A Das Gupta, Arihant, Loney, TMH, Cengage, etc.?

ArmaGeddON

i usually do maths from ncert, r.s. and some question banks

i have arihant at least

Swapnil Das

Arihant Trig right?

ArmaGeddON

not enough, fiijee's level is way too high

Swapnil Das

7:24 PM

They copy from RD Sharma.

Never noticed?

11th grade RD sharma I mean obviously.

ArmaGeddON

i don't have R.D.

Swapnil Das

Buy.

ArmaGeddON

i am sharma but doesn't give me for free

Swapnil Das

Or study from Arihant?

It is way better than RD.

ArmaGeddON

i do

actually i did

Swapnil Das

7:26 PM

amazon.in/Plane-Trigonometry-Part-1-S-Loney/dp/… You can at least afford 89 rupees, no?

Best for basics.

ArmaGeddON

m saying it now 57th time, i have that book, and i have completed it!

i took that book from my friend Nakul G

Swapnil Das

Then why fear trigo!

ArmaGeddON

Nakul Gupta (or G***u)

cuz i think arihant isnt enough

Swapnil Das

Brilliant.org

Solve trigo from here, then.

user253310

@ArmaGeddON Did you solve all the problems in Arihant Trigonometry ?

Swapnil Das

7:29 PM

Exactly, he must have been a stalwart then.

user253310

I feel that Arihant is more than enough

ArmaGeddON

i did

Swapnil Das

Questions are of JEE level, still?

ArmaGeddON

but when i opened Fiitjee modules i got all twisted

user253310

@SwapnilDas They are above JEE level.

user253310

7:30 PM

@ArmaGeddON Can I test your trig?

Swapnil Das

@Doraemonドラえもん Ohk yes I agree.

ArmaGeddON

neh

Swapnil Das

Let him pose one.

user253310

Since you said that you completed Arihant

ArmaGeddON

my tuition teacher made us complete arihant in summer holidays

Swapnil Das

7:31 PM

Arihant completion is really a big thing, I can only dream of that.

ArmaGeddON

i forgot most of it also :/

Swapnil Das

@ArmaGeddON Name of author?

ArmaGeddON

SL LONI

Swapnil Das

Of that arihant book^^

Mar tu!!

user253310

@ArmaGeddON Then it is same as not doing it :P

Swapnil Das

7:31 PM

I suspected that.

We are referring AMA!

Amit M Agarwal Trigonometry.

ArmaGeddON

lol what?

user253310

I have that red white book at hand

Swapnil Das

@Doraemonドラえもん Bhai see.

user253310

Trying to select a question for Arma

user253310

:P

Swapnil Das

7:33 PM

He was referring Loney.

Bhai Arihant trig means always by AMA.

Loney is old fashioned CBSE level.

user253310

@SwapnilDas Oh...I thought he meant the Amit M's one

ArmaGeddON

u were referring to this 600 badly fat book

Swapnil Das

yes!

JEE guys sweat to complete it.

user253310

ArmaGeddON

@SwapnilDas Same here :p

Swapnil Das

7:34 PM

Your words gave me and @Doraemonドラえもん a partial heart stroke.

user253310

@SwapnilDas Which words ? :P

user253310

Haha

Swapnil Das

That he completed AMA Trig.

user253310

Loney is wayyyyyyyyyyyy easier

ArmaGeddON

happens happens

:p

Swapnil Das

7:35 PM

:P

user253310

I really got a stroke

ArmaGeddON

m good with NCERT :p

user253310

A 10 th grader completing that book

ArmaGeddON

it has nice questions

user253310

OMG

Swapnil Das

7:36 PM

@Doraemonドラえもん Exactly.

@ArmaGeddON what?

ArmaGeddON

NCERT has nice questions i said

at least they don't scare me a bit

Swapnil Das

I want sleep now, lest I should faint.

ArmaGeddON

gn

Swapnil Das

Bhai leave NCERT do Arihant.

Gn @ArmaGeddON and @Doraemonドラえもん

user253310

Goodnight @SwapnilDas and @ArmaGeddON

ArmaGeddON

7:37 PM

i'll get that book from my tuition teacher

user253310

:)

ArmaGeddON

@Doraemonドラえもん i ain't sleeping that early

user253310

@ArmaGeddON I just said goodnight :P

user253310

I didn't say anything about sleep :P

user253310

Even I will wake tonight :D

ArmaGeddON

7:39 PM

btw, can u suggest me where to study combinations of resistance from?

i'll have electricity module tomorrow

will do it too

user253310

@ArmaGeddON Any class 12 physics book...

ArmaGeddON

class 12?

user253310

that might help

user253310

for the advanced problems

ArmaGeddON

wont they screw me?

user253310

7:41 PM

i dont think so

user253310

its easy

user253310

btw it is best to do your modules first

Mahmoud

Hi.

ArmaGeddON

i'll ask my mother to take out my sis's book tomorrow, she's sleeping now

user253310

@ArmaGeddON okay...i have to go now

user253310

7:42 PM

bye

user253310

:)

ArmaGeddON

@Mahmoud hi

@Doraemonドラえもん bye :)

m also going, i wasted much time

user253310

Oh and the Cengage book is the best for resistance problems

user253310

The electrostatics and current book

user253310

by bm sharma

user253310

7:45 PM

user253310

@ArmaGeddON

user253310

bye now :)

DanielSank

8:11 PM

Hi, everybody.

AccidentalFourierTransform

hi

what's crackin

DanielSank

In Boston.

Things eaten so far:

Pizza, pastrami, bagel.

All things I can't get in California.

AccidentalFourierTransform

now Im hungry

thanks

DanielSank

You're welcome.

AccidentalFourierTransform

@DanielSank what's with the octopus btw?

You've probably been asked this before many times

DanielSank

8:21 PM

@AccidentalFourierTransform Octopuses are amazing, interesting animals and I like them very much.

AccidentalFourierTransform

agreed.

DanielSank

They have three hearts.

Their blood uses copper instead of iron for oxygen-binding, so its blue-green.

They can change color.

They're smart.

AccidentalFourierTransform

but they do something weird with their genitalia to reproduce, IIRC

DanielSank

Well, in some cases the male gives the female one of his arms, which contains gametes.

And she can store the gametes for a while before using them.

AccidentalFourierTransform

"detachable penis" according to google

DanielSank

8:26 PM

yup

AccidentalFourierTransform

it surely sounds like fun :D

ACuriousMind

8:44 PM

@DanielSank ...you can't get pizza in California?

AccidentalFourierTransform

no, it is illegal bc of the drought

DanielSank

9:00 PM

@ACuriousMind It's hard to get good pizza.

You can get "bagels" too, but they're not bagels.

They're round bread.

heather

9:28 PM

hello

@DanielSank, my dad gets annoyed at the pizza here- he's from NJ and so is used to the best pizza

DanielSank

9:46 PM

@heather I sympathize

Bernardo Meurer

I am done with Chemistry!

heather

Congratulations!

no more oompa-loompa professor

Bernardo Meurer

May we never again cross paths

Screw you $K_{\text{whatever}}$

heather

how do you think it went?

the final exam, i mean.

Bernardo Meurer

Very bad, but I think I got the 7 I needed to pass

heather

9:54 PM

well, that's good, at least

Bernardo Meurer

Then I'll take the recovery exams in january to improve my grades

but since I already passed it's easier

DanielSank

Congrats, bro.

heather

awesome!!

heather

10:10 PM

whoops

-2

Q: Are metric tensors (or even pseudo-metric tensors) really metrics?

In some discussions of metric tensors $g : TM_p \times TM_p \rightarrow \mathbb R$ (and even of pseudo-metric tensors, for instance in this answer), and of the corresponding first fundamental forms ${\rm d}s^2$, these (mathematical) objects are referred to as "metric". Is this serious and corre...

^shouldn't this be migrated to math.SE?

Emilio Pisanty

The ALPHA experiment observes light spectrum of antimatter for the first time

►

paper currently (?) open access at nature.com/nature/journal/vaap/ncurrent/full/nature21040.html

AccidentalFourierTransform

neat

heather

cool!

AccidentalFourierTransform

@heather definitely, yes

(I mean, the migration)

heather

does the array environment belong inside an equation environment in latex?

Emilio Pisanty

10:16 PM

@heather it works, yes, but as to "belong"...

what are you trying to do?

99% of the time you're better off with align, pmatrix, or cases

AccidentalFourierTransform

and split

I use it all the time

heather

@EmilioPisanty, create a matrix without using the amsmath package.

Emilio Pisanty

@AccidentalFourierTransform split? what's it do?

@heather pmatrix

heather

pmatrix, okay, i'll look into that

AccidentalFourierTransform

I use it to align several columns

it is very useful

DanielSank

10:18 PM

+1 for \align

Emilio Pisanty

@heather not much to look into. $\begin{pmatrix}1&0\\0&1\end{pmatrix}$ $\begin{pmatrix}1&0\\0&1\end{pmatrix}$

@DanielSank wait, \align?

DanielSank

How is that different from \array?

Emilio Pisanty

I was talking about \begin{align}

DanielSank

@EmilioPisanty that's what I meant.

David Z

@heather don't do anything without using amsmath

Emilio Pisanty

10:20 PM

@DanielSank mathematicians and phycisists saying one thing and writing another and meaning another, and all that?

@heather what david said

heather

@DavidZ, it's not for me, it's for some documentation on SO

Emilio Pisanty

@heather oh, wait, you said without?

heather

i thought that amsmath was the only option when I wrote it a couple months ago, but I found out about the other options inadvertently, and so I'm updating it.

Emilio Pisanty

why, oh, why?

heather

@EmilioPisanty I've lost track now, where did without come from.

David Z

10:21 PM

@heather Oh, are you talking about MathJax? All the important amsmath environments are included in MathJax.

heather

@DavidZ, no, LaTeX, not MathJax.

Emilio Pisanty

@heather why are you trying to LaTeX stuff without amsmath?

DanielSank

@EmilioPisanty er, just... you know... a mistake.

heather

0

score

6

examples

Typesetting mathematics

0

Basic Equations

0

Complex Equations

1 contributor

edited yesterday

heather

21222

@DavidZ, ^

David Z

@heather Then don't do anything without amsmath

heather

10:23 PM

@DavidZ, but you can do stuff without amsmath, and since it's documentation, I thought it best to include the information.

Emilio Pisanty

@heather why?

the use case is nonexistent

David Z

@heather No. It's not.

heather

@DavidZ ?

Emilio Pisanty

@heather it makes the docs confusing and actively misleading

if your maths has matrices in it, you're well past the point where you should be using amsmath

heather

@EmilioPisanty maybe some journals require that amsmath not be used?

David Z

10:25 PM

@heather Then nobody should publish in those journals.

heather

I guess, as long as it is encouraged to use amsmath, why is it a problem to give the option of not using amsmath for those extreme rare cases?

Emilio Pisanty

@heather in which case they likely have very specific document classes, which means that any given solution, as likely as not, will also break

David Z

It encourages bad typesetting

Emilio Pisanty

and frankly, if a journal required me to submit in a latex class incompatible with amsmath, I would either go elsewhere or (if really, really necessary) submit with a 'wrong' file

as would most others, I think

heather

wow

Emilio Pisanty

10:27 PM

@heather it's not "encouraged" to use it, it is "enormously discouraged" to not use it when you do need it

heather

i didn't realize that this was such a big deal.

Emilio Pisanty

it's that basic a building block

heather

okay.

Emilio Pisanty

it's just essentially impossible to do maths on tex without those tools

ask around on chat.tex.se before you write anything (about latex$\setminus$amsmath)

make sure you say something nice about ducks first

Bernardo Meurer

I had a good analogy here, but it's NSFW :/

heather

10:28 PM

okay

will do

Pissed off layman

@heather why are there pulsating blue dots in that post?

Bernardo Meurer

@heather Please do some GR magic and become 18, thx

heather

@Pissedofflayman, pulsating blue dots...what?

@BernardoMeurer why?

Emilio Pisanty

@Pissedofflayman did you try clicking on them?

@heather so he can post whatever inappropriate thoughts he's dying to voice

Bernardo Meurer

@heather So I don't need to contain my profanity as much :P

heather

10:30 PM

er...do you want me to leave the chat room for a few minutes or something?

Pissed off layman

No, should I? @EmilioPisanty

Emilio Pisanty

@Pissedofflayman if you want to keep the mystery, don't click on them

if you want to know what they are, do

Bernardo Meurer

@heather That won't help, it was directed at you :P

Make a note, ask me in 5(?) years

heather

@BernardoMeurer, then just say it, I won't be offended

I've heard plenty of profanity

Bernardo Meurer

@heather I can't, I have jesus in my heart

ACuriousMind

10:31 PM

@BernardoMeurer What you can post here does not depend on who is currently there. If you wouldn't post it while heather is here, don't post it when she's not either.

3

Pissed off layman

@EmilioPisanty they look too much like "click bait" :P

heather

@BernardoMeurer ::head starts spinning:: confusion

Bernardo Meurer

@ACuriousMind That's not the point, the point is although I'll tell you to f**k off and lick a lolypop I wouldn't say that to her

Although what I wanted to say had nothing to do with those examples

heather

just say it @BernardoMeurer, now I'm curious

=P

Bernardo Meurer

@heather We will go back to it in 5 years

heather

10:34 PM

::sighs:: very well, master

::retracts lightsaber::

Bernardo Meurer

Which reminds me, I gotta watch rebel one

@G.Bergeron I told you Arrival was absolute utter shit!

AccidentalFourierTransform

@BernardoMeurer youtube.com/watch?v=hpigjnKl7nI

3

Bernardo Meurer

Omg

that is glorious

AccidentalFourierTransform

A star :D I feel popular (see mother?)

Bernardo Meurer

Carolina Eyck Trio - Drawings

►

Carolina is my one true love I goddamn swear

G. Bergeron

10:41 PM

@BernardoMeurer Yeah well, form the trailer, I expected something else... Also seeing that movie in a less than optimal format didn't help either :p

Bernardo Meurer

@G.Bergeron Have you watched Rick and Morty?

G. Bergeron

@BernardoMeurer That is the single MOST awesome tv show there is!!!

Especially when I discovered season 2 existed last January

@BernardoMeurer Not punchy enough

Bernardo Meurer

@G.Bergeron I have the meme of your life

Give me a second

@G.Bergeron Man, her contemporary and experimental work with the Theremin is amazing

G. Bergeron

@BernardoMeurer I listen almost uniquely to fast paced psychedelic trance... :P

Bernardo Meurer

G. Bergeron

10:45 PM

@BernardoMeurer LOL

Bernardo Meurer

This made me laugh so much I almost punctured a lung

AccidentalFourierTransform

G. Bergeron

SPOILERS (Maybe): But really that whole ''Learning a new language will let you think like them hence, with aliens, you will see time differently as they do'' was just too much!

@AccidentalFourierTransform XD And then Rick said something like: Yeah well welcome to the club, pal

@BernardoMeurer I am sorry to have doubted you on that movie

Bernardo Meurer

@G.Bergeron I told you it was some proper stupid crap

G. Bergeron

I finally bought a stand + keyboard for my laptop at home. I will stop developing carpal tunnel syndrome hopefully!

David Z

10:51 PM

@G.Bergeron that's what did it for me too

Bernardo Meurer

@G.Bergeron Carpal Tunnel Syndrome sounds far, far cooler than it really is

G. Bergeron

@DavidZ I have hope!

Bernardo Meurer

@DavidZ Why would they get a theoretical physicist to decipher a language?

AccidentalFourierTransform

@G.Bergeron I recently bought a mouse for my laptop, but I'd been using the mousepad for so long that now the mouse feels wrong

I dont use it

David Z

@BernardoMeurer don't ask me

G. Bergeron

10:52 PM

@AccidentalFourierTransform Yeah I'd ideally ditch the mouse, I don't like them. Except when I do 3D modelling... Then a mouse is a gift from heaven

Bernardo Meurer

@DavidZ There was a phrase at the end that almost gave me a stroke too

Dec 9 at 1:24, by Bernard Meurer

And the line "I've had my head tilted at the stars ever since I can remember, but it wasn't meeting them [aliens] that amazed me the most ... it was meeting you"

^ Horrible

AccidentalFourierTransform

@G.Bergeron 3D modelling? cool! what for?

G. Bergeron

@BernardoMeurer I'm actually not sure it's the stupidest choice, since it probably has nothing to do with human language. Actually, I would bring NSA cryptanalysts!

Bernardo Meurer

@G.Bergeron I'd get mathematicians, logicians, linguists, cryptanalysts

G. Bergeron

@AccidentalFourierTransform When designing the hardware for the things I build, it really helps being sure all the tolerances are ok. It's functional not artistic.

AccidentalFourierTransform

10:56 PM

You can be functional and artistic at the same time ;-)

G. Bergeron

@BernardoMeurer Are you sure about linguists? I mean, yes why not, but it might increase the chance of introducing a bias for the human way of thinking/communicating. At beginning, it would be a massive data analysis task with the relation to language coming at the very end.

@AccidentalFourierTransform Not sure I can

dmckee

@BernardoMeurer If you had access to a full library, you'd want some chemists and physicists as well as mathamaticians, linguists and what not. Because the physical science and math texts (from primary school on up) will give you unambiguous nouns and verbs (mostly of a technical nature but you have to start somewhere).

Bernardo Meurer

@dmckee I'm not sure I see your point, if I want to build a house I can call a physicist, a chemist, a civil engineer, a linguist, a biologist and a zookeeper, or I can call just the engineer and odds are the house will be just as good

G. Bergeron

@BernardoMeurer Because we (collectively) know what we're doing in that case.

Bernardo Meurer

I.e. why would having a physicist be better than adding another linguist or mathematician or someone who actually works in information/languages/logic

G. Bergeron

10:59 PM

I think he meant to talk about the universality of math

Typesetting mathematics

Transcript for