The h Bar

Mostafa

3:00 PM

@Loong I'm waiting for that magnificent moment that it removes all of the (nonattending) avatars...

user228700

3:19 PM

@Mostafa Same here :-P I've been waiting since morning!

user228700

Say, does anybody know anything about the battle of Dunkirk?

Balarka Sen

@0celoñe7 i'm ded man

user228700

Oh hey @Balarka :-)

Balarka Sen

@Blue Oh yeah, we should. Where do you want to meet? (I won't be available for the next uh 10 days)

0celoñe7

@BalarkaSen Do you know Riemannian geometry now

Balarka Sen

3:27 PM

I start knowing Riemannian geometry from 24th, when the wOrKsHoP starts

Hey @Kaumudi.H

0celoñe7

@BalarkaSen I have a mysterious mystery for you.

Balarka Sen

I am spooked bruh

0celoñe7

@BalarkaSen Let $M^n\hookrightarrow \Bbb R^{n+1}$ be a closed embedded hypersurface. Suppose that $M$ has strictly positive mean curvature. Then (i) $M$ bounds a convex subset of $\Bbb R^{n+1}$. (ii) $M$ is diffeomorphic to $S^n$. (iii) The Gauss map is the diffeomorphism.

user228700

9 mins ago, by Kaumudi. H

Say, does anybody know anything about the battle of Dunkirk?

user228700

Never mind.

Balarka Sen

3:30 PM

old chap chris is making another movie eh

user228700

*made. I'm watching it tomorrow!

Balarka Sen

let me know by ping how it is

user228700

Sure thing.

Balarka Sen

@0celoñe7 You have to remind me what mean curvature means in high dimensions. I know it's $(k_1 + k_2)/2$ where $k_i$ are the eigenvalues of the shape map in dimension 3. Trace of shape map divided by dimension?

0celoñe7

@BalarkaSen It's just the trace of the shape operator.

Balarka Sen

3:33 PM

Ok, I wasn't far off

0celoñe7

@BalarkaSen Mean curvature it not actually an average

Blame physicists

Balarka Sen

hmmmm

0celoñe7

@BalarkaSen Wait, not shape operator

Second fundamental form

I don't know how to prove this btw

I'm thinking about it

Balarka Sen

Oh yeah IInd form

That's like a great theorem man

0celoñe7

@BalarkaSen it is mentioned as a footnote in some lectures I was told to read...

I know that for a constant positive mean curvature surface, it is exactly a standard sphere

Not sure if the same method works here

Balarka Sen

3:39 PM

I gotta run now but maybe I'll think about it a bit

0celoñe7

@BalarkaSen Hmm. I read this wrong.

(i) needs to be "if the second fundamental form is nonnegative definite"

AccidentalFourierTransform

@JohnRennie does the intro ring a bell?

0celoñe7

(ii) follows from standard analysis once (i) is established

(iii) is a bit harder

Balarka Sen

is it a morse theory argument

0celoñe7

@BalarkaSen Morse theory only ever gives homeomorphisms.

jyotishraj thoudam

3:40 PM

whats the morse theory about?

John Rennie

@AccidentalFourierTransform no, you're just paranoid :-)

AccidentalFourierTransform

:-P

Balarka Sen

@0celoñe7 tru

well, officially running now

0celoñe7

@BalarkaSen Hmm, my argument also only gives a homeo. Damn.

@jyotishrajthoudam studying homotopy type of manifolds by looking at critical points of nice functions

10

Q: Is there a way to relate convexity to Gaussian curvature?

This is a vague question because I'm not sure what I want to ask. An ellipsoid has positive curvature everywhere, and bounds a convex subset of $\mathbb R^3$. What I want to say now is "It seems as though a surface with negative curvature can't be convex" but this isn't right, because the ellips...

@BalarkaSen

Hmmm

It seems quite nontrivial.

@JohnRennie I did not make burgers because I already thawed the chicken

Peas were good

John Rennie

Good :-)

Anonymous

3:45 PM

@BalarkaSen My grandparent's house is in Sodepur. I'll let you know when I visit them next time. BTW you in Mumbai for the TIFR workshop?

John Rennie

As it happens I've just eaten chicken with white sauce with peas and noodles. Also very good :-)

0celoñe7

@JohnRennie I'm trying to eat up food before I move...

it's going to be an issue

Sid

@JohnRennie What is white sauce?

John Rennie

Béchamel sauce

Anonymous

:P

Anonymous

3:48 PM

Probably something related to butter/cheese

Anonymous

" white roux (butter and flour) and milk."....k I was close :D

Sid

(That looks like that chutney they give with idlis..)

Anonymous

That is toh coconut chutney

Sid

Like I said, it "looks like" that.

Anonymous

yeah

John Rennie

3:52 PM

Maggi noodles :-)

Sid

(That doesn't seem to have spices though.)

Also, is that butter, there?

John Rennie

No, I didn't use any butter because I didn't want it to be too rich. But you're right I should have used more chicken/sauce, or less noodles. Still nice though.

Anonymous

I don't like maggi unless it is drowning in soup :-P

Anonymous

jyotishraj thoudam

@JohnRennie Maybe we should ask for a review from Gordon Ramsey Haha

John Rennie

4:00 PM

@Blue the noodles did work well with the chicken and sauce. I cooked them in lots of water but then strained off the water before adding the chicken and white sauce.

ACuriousMind

@JohnRennie "Maggi noodles" are something else than instant noodles in English? oO

Anonymous

Well, yes. If you cooked them in lots of water that's fine. Usually dry maggi doesn't taste very good and becomes a sticky mass soon.

John Rennie

@ACuriousMind no they are just instant noodles. But I think the brand is so well known in India that Maggi noodles has become a bit of a generic term.

@Blue Dry Maggi??????

ACuriousMind

@JohnRennie I was confused because I don't think "cooking" is an adequate description of the process of preparing instant noodles :P

Anonymous

@JohnRennie By dry I mean the "water" drying off by itself if left for a few hours

John Rennie

4:03 PM

@ACuriousMind Shrug :-)

Sid

@ACuriousMind Do remember that I have messed up making instant noodles once. So, it's very much cooking. :P

John Rennie

To be honest the chicken in white sauce came out of a tin. I did grate the black pepper over the top myself though :-)

Anonymous

Here we tend to eat maggi as soon as cooked otherwise if the water dries off it doesn't taste as good

Anonymous

@JohnRennie haha...that's true

ACuriousMind

@Blue I was going to ask why you'd let the noodles sit around for the water to dry :P

John Rennie

4:04 PM

@Blue I'm not surprised. That sounds a revolting idea.

Anonymous

@ACuriousMind Suppose you carry the maggi noodles in your tiffin box to school/college :P Many people do that..hehe

0celoñe7

wth is a tiffin

John Rennie

Type of cake

Anonymous

Nah...tiffin box means lunch box here :P

Sid

@JohnRennie No

Here it typically means a light snack

0celoñe7

4:07 PM

there's something wrong about indians correcting a British man's english

Anonymous

google.co.in/…

Sid

@0celoñe7 Different uses in different countries

0celoñe7

@Sid Britain > others

ACuriousMind

@Blue I'm pretty mystified at the idea of taking prepared instant noodles with me instead of, say, bread, with which you have no danger of it getting cold or dry :P

John Rennie

@Sid Ah yes. Though it is also a type of cake:

Tiffin (confectionery)

Tiffin is a form of cake-like confection composed of crushed biscuits (most commonly digestive biscuits), sugar, syrup, raisins and cocoa powder, often covered with a layer of melted chocolate. Unlike regular cakes, Tiffin does not require baking. Instead, following preparation of the mixture, the confection is chilled until set. As a consequence the product may also be known as 'fridge cake' or another similar term. It was invented in the early 1900s in Troon, Scotland. The confectioner Cadbury produces a chocolate bar called "Tiffin", consisting of biscuit pieces and raisins in chocolate, as...

Anonymous

4:09 PM

@JohnRennie This is something new for me :) Never heard of "tiffin" being used to refer to a cofection.

0celoñe7

Sid

@0celoñe7 Oh, in case you are wondering, we do use spoons and forks to eat that. :P

0celoñe7

@ACuriousMind I tried to mod TW3...

John Rennie

@0celoñe7 I think the meaning of tiffin as a light meal originates from the British Raj. It's one of quite a few Indian words that made their way into British English from India.

jyotishraj thoudam

@JohnRennie Hey John could you help me figure out where I can find the most elementary introduction to tensor

Assume that I have just finished my calculus course

A book perhaps

John Rennie

4:12 PM

@jyotishrajthoudam There are a few good YouTube videos on the subject if you want an intuitive grasp of what tensors are and how they work.

jyotishraj thoudam

I would be glad to read a book instead

Maybe you could suggest me a book or the path to understand tensors>

John Rennie

I can't help I'm afraid because I'm out of touch with modern maths/science books

0celoñe7

"Metric Structures in Differential Geometry" by Walschap.

jyotishraj thoudam

Okay

@0celoñe7 I'll look into this

Thanks @JohnRennie

Sid

@JohnRennie One of the very few benefits of the British Colonialism in India was imposition of English and it has worked both ways actually. British English taking some words from India(Bazaar) and Indians mainly using British English.

0celoñe7

4:14 PM

Very few?

Didn't the Brits establish the railways?

John Rennie

@jyotishrajthoudam Have a read of the Feynman lecture on tensors

Sid

@0celoñe7 Only for the use of British soldiers/officials and transportation of coal.

Not to say that we wouldn't have done that ourselves..

Anonymous

^

John Rennie

@0celoñe7 not really. The Brits built only the railways that benefited the Brits rather than the rest of the population

Anonymous

Many people still have the misconception that the Brits improved our lives radically by introducing railways. The railways were introduced only to facilitate their trade.

John Rennie

4:17 PM

On the whole the Raj was not one of Britain's finest hours. There are a lot of apologists for it in the UK but really it was pretty disgraceful.

0celoñe7

@Sid See, I hadn't considered that before. My opinion of Indian eating has not changed.

@JohnRennie More or less disgraceful than the American colonialism?

Sid

wait, let me link you to a video.

Dr Shashi Tharoor MP - Britain Does Owe Reparations

►

Anonymous

We love to eat with our hands in case you didn't know. :)

jyotishraj thoudam

@Sid Exactly

0celoñe7

Reparations?

really?

Anonymous

4:19 PM

@0celoñe7 That's like trying to compare murder and rape. Better if we steer away from that discussion.

0celoñe7

@Blue It's revolting, quite honestly.

Sid

@0celoñe7 Hands are usually limited to lunch/dinner. Usually breakfast or snacks are eaten with cutlery.

0celoñe7

@Sid That does not pass the common sense test at all.

Anonymous

@0celoñe7 Your opinion isn't gonna change anything. Unfortunately.

John Rennie

@0celoñe7 Humans have been mean to other humans for all of recorded history, and well before that if archeological evidence for massacres is to be believed. I don't think we should lie awake at night agonising about the sins of our ancestors.

0celoñe7

4:20 PM

@Blue I can still complain on the internet.

Anonymous

@0celoñe7 Sure

0celoñe7

@JohnRennie I, for one, do not lie awake at such thoughts.

I wasn't the one who brought it up.

Sid

@0celoñe7 Well, different cultures. Also, try eating Butter Chicken in spoon and try eating that with hands..

You will know the difference.

@JohnRennie Of course not. I don't mean to take that course here. Just showing history really..

0celoñe7

Btw, Indians, the hottest new rapper around is Indian.

Sid

who?

Don't tell Dhinchak Pooja or whatever her name is..

Anonymous

4:22 PM

Dhinchak Pooja maybe

Anonymous

meh

0celoñe7

NAV - Some Way ft. The Weeknd

►

Nav.

Although that song is basically just The Weeknd.

NAV - Myself

►

Anonymous

Gonna have Tandoori Chicken tonight. I'm excited *_* :D

0celoñe7

@JohnRennie Trying to get my PC to stably run a 2002 game...

Sid

@Blue That reminds me. I haven't eaten Chicken in a month. :/

0celoñe7

4:29 PM

What the heck have you been eating

Sid

@0celoñe7 Veggie stuff, cottage cheese, broccoli, etc.

Anonymous

@Sid Try dining out with your family once before your uni starts. :)

Sid

@Blue Considering tomorrow is my last day at home, I don't think that's possible.

Anonymous

@Sid Why not? On the way you should have some good restaurants!

Sid

I am starting at 4:00 AM on Monday. Apart from some breakfast, I don't think there would be any lunch with family. :-)

Anonymous

4:34 PM

You have Sunday left :P

Anonymous

Today is just Saturday XD

Sid

@0celoñe7 I have eaten fish though if you are talking about non-veg stuff. :-)

Anonymous

My favourite fish is Pomfret

Anonymous

Well Prawn is not bad either :D

user228700

@ACuriousMind Hey, it really is! I add vegetables and cheese and sauces and everything!

user228700

4:43 PM

@Sid ...or breakfast.

Sid

... Really? I have never heard "tiffin" being used for breakfast.

user228700

@JohnRennie And yet, a hard box-shaped noodles is what Maggi eaten at lunch at school typically is. No, it wasn't very good.

Anonymous

tiffin can refer to light meal here

user228700

@Sid In the South, it is taken to mean breakfast; idli, pongal, dosa etc. all fall under the category of "tiffin" and breakfast. I'm fairly certain that those two sets are the same in TN.

0celoñe7

@Kaumudi.H What?

Never heard of those things.

user228700

4:46 PM

Right, well, they're all eaten in the southern states of India.

0celoñe7

@Kaumudi.H TN is not in India...

I am in TN

user228700

Tamil Nadu.

0celoñe7

@Kaumudi.H Tennessee

user228700

Sure.

Sid

@0celoñe7 Eh, think of it this way. Dosa is basically pancakes with spices, Idli is biscuits made of rice.

I dunno what is pongal.

user228700

4:48 PM

...both descriptions completely miss the point, actually.

AccidentalFourierTransform

dry noodles are great

before adding water

they are crunchy and they taste great

Sid

@0celoñe7 You are in which city? Nashville?

0celoñe7

@Sid -.-

user228700

Dosa isn't spicy at all; it's quite bland. So is idli. While idli is more of bland cake, a dosa is a bland circle. And pongal, that I don't like so I dunno how to describe it. @Sid: Have you heard of the festival of pongal?

Sid

Heard, Yes. What is it? I dunno

user228700

4:50 PM

I see.

Sid

@0celoñe7 Is that a "Yes" or a "No" or "I don't want to answer it"?

0celoñe7

@Sid that's a big no

user228700

@JohnRennie Looks good! :-)

Sid

@0celoñe7 The only other large city I know in Tennessee is Knoxville. There?

0celoñe7

@Sid Yes, but you also forgot Memphis...

Sid

4:52 PM

Oh, Memphis is in Tennessee? I didn't know that, actually.

user228700

@Sid NOBODY eats dosa using a spoon/fork. That'd be mental.

Sid

@Kaumudi.H It is possible to eat if you want to spend a lot of time to eat.

0celoñe7

picture of this mental food?

user228700

@Sid I didn't say that it wasn't possible. Only that it would be completely mental to try.

Sid

@0celoñe7 Here: img.grouponcdn.com/deal/fndYqd3FYJpV1ip78C86/tR-1762x1057/v1/…

@Kaumudi.H I have tried. Took me 30 minutes to eat something that usually takes me 10-15 minutes. :P

0celoñe7

4:55 PM

that seems to acceptable for finger food

although I would prefer to just avoid eating it altogether

user228700

My thoughts:

user228700

Jul 2 at 7:30, by Kaumudi. H

@0celo7 I don't believe that knowing how to eat using cutlery makes one any more or less civilised; that argument doesn't make any sense at all. We all may have switched to eating using cutlery at any point in time but we haven't because eating with our hand makes for a more mindful experience.

Sid

Um... he never mentioned civilised now. He just says he wouldn't prefer to eat that.

user228700

He did before and I doubt if he saw this message.

ACuriousMind

Please do not call benign differences in cultural norms "uncivilized".

AccidentalFourierTransform

4:58 PM

delet this

Sid

whoa whoa, let's not fight. No one takes this as offence clearly.

user228700

@Sid Actually, no, it is quite offensive to me to be called uncivilised.

Anonymous

I find it funny that you call it uncivilized without giving any logical reason for it. Anyhow.

user228700

In any case, I'm not riled up or anything so whatevs, really.

ACuriousMind

@Sid Not so clear, 0celonez' comment was just flagged and I agree it is offensive to call other people's behaviour uncivilized or savage.

user228700

4:59 PM

(To be clear, I wasn't the one who flagged it)

AccidentalFourierTransform

>using "n" instead of "ñ"

now I feel insulted ;-)

ACuriousMind

@AccidentalFourierTransform I also used z instead of 7 :P

user228700

How come? The z is nowhere near the numbers!

Mostafa

@ACuriousMind At least your hand only gets into your mouth. but a spoon is used by many ;)

AccidentalFourierTransform

@Kaumudi.H the Spanish ending for family names is ez

(for most common names, that is)

not mine, I'm special

user228700

5:01 PM

Ah.

user228700

@AccidentalFourierTransform Oh, you're Spanish? Didn't know :-)

AccidentalFourierTransform

yeah, "fiesta, siesta e Iniesta" (party, siesta/nap, and Iniesta [football player])

ACuriousMind

@Mostafa Why would many different people use my spoons? (Also, you perhaps don't wanna know what some people do with their hands...)

Anonymous

The cleanliness argument doesn't hold for either the spoon or the hand. You are expected to wash your hand properly before you touch food. Also, you are supposed to use a clean spoon to eat. Both are fine. It just depends on personal preferences.

ACuriousMind

I wasn't commenting on the cleanliness, I was just pointing out that Mostafa's idea of where spoons and hands go is perhaps not universal ;)

I personally don't care whether people eat with hands, cutlery, or use little catapults to throw the food into their mouths :P

Anonymous

5:06 PM

This answer explains why some people like to eat with their hands. :)

Anonymous

@ACuriousMind I get it :D

ACuriousMind

Though the catapult idea sounds intriguing, now that I think about it...

Mostafa

@ACuriousMind Do you carry your spoon with yourself wherever you go?

Anonymous

lol...food gun

ACuriousMind

@Mostafa Yes, it is my precious

Anonymous

5:08 PM

Mostafa

@ACuriousMind Nice.

Then my argument doesn't apply to you.

Anonymous

@ACuriousMind Made for you ^ :'D

ACuriousMind

Ew, broccoli :P

AccidentalFourierTransform

remember this spoon designed for people with Parkinson's?

I guess you could use that to brush your teeth while you pee

Mostafa

5:14 PM

Feb 28 at 19:51, by DanielSank

@Mostafa Are you exercising and sleeping enough?

Sid

@ACuriousMind Broccoli is very healthy

Mostafa

@DanielSank a few months after this ^ (when I started to exercise regularly), I'm guaranteed to have a bad day if I haven't exercised the day before

dmckee

Bernard Shaw on customs and barbarism.

ACuriousMind

@Sid That doesn't make it tasty.

dmckee

Gotta say that Bush the Elder's decision to keep broccoli off the White House table is one of very few decision during his tenure that I can wholeheartedly endorse.

user228700

5:16 PM

@AccidentalFourierTransform Wtf? O_o

AccidentalFourierTransform

@K yeah, I dont expect you to understand it ;-)

dmckee

I do eat a little of the stuff, raw and in small pieces, but because (a) it's good for me and (b) I can drown it in some kid of dip or dressing.

user228700

@AccidentalFourierTransform O_O

AccidentalFourierTransform

( ͡° ͜ʖ ͡°)

Mostafa

Jun 23 at 15:27, by 0celo7

@JohnRennie why would they have this chat at the top of the watch list?

@0celoñe7 And this room is always watched by a couple of Germans mods (ACM, Loong, Danu,...) ...

I think ACM has asked them for help :)

ACuriousMind

5:19 PM

@Kaumudi.H He presumably has trouble keeping on target when standing up to pee and brushing due to the motion while brushing :P

@Mostafa Danu is Dutch.

Sid

@ACuriousMind I think it is enough to eat not to like eating. :P

AccidentalFourierTransform

what? Broccoli tastes really good

Mostafa

Apr 23 at 21:25, by Mostafa

@ACuriousMind Is the language really different?

AccidentalFourierTransform

Yes. One of them is not that bad of a language, and the other one is Dutch.

ACuriousMind

@Mostafa Different enough that its not mutually intellegible in speech, samey enough that you can decipher most signs etc without speaking the other.

@AccidentalFourierTransform Dutch is what happened when English and German got a little too drunk :P

AccidentalFourierTransform

5:27 PM

lol

@Mostafa ouch

Mostafa

@AccidentalFourierTransform My data plan is quite good (at least for me)

AccidentalFourierTransform

but quite expensive, I guess?

> Ask that to my neighbour

Mostafa

It's a 1 year plan with 288 GB traffic, for ~$110
(LTE)

Enough for me

Anonymous

My home broadband is only 2Mbps :P However, since Reliance Jio came into existence my mobile internet speed has jumped upto 40-50 Mbps on average for only $2 per month (on average) for 2GB per day

Anonymous

Pretty cheap :D

Mostafa

5:35 PM

@AccidentalFourierTransform But yes, the ADSL (non-mobile) connections are really low-quality expensive rip-offs

@Blue That's really nice!!!! $2 per month with 2 GB per day!!

@AccidentalFourierTransform That's a sin

Anonymous

@Mostafa Yeah. It's just awesome. Google search "Reliance Jio 4G".

AccidentalFourierTransform

If you're happy and you know it, that's a sin!

►

Mostafa

There are like 10 WiFi connections (with WPS enabled) detected here right now. So if you want to do that, it's a matter of minutes to get access to their network. but....

Anonymous

Same here. But even if I crack their password the signal strength would be too low. :P

Mostafa

Jun 13 at 18:47, by AccidentalFourierTransform

@Mostafa premarital sex is a sin