Mathematics - 2014-03-31 (page 2 of 3)

Hawk

13:00

ok...go on.

Sawarnik

give something challenging. the one i know you are wanting is that $x^2$ is positive and $\sin^2x$ never exceeds 1...

Hawk

Okay...

there are 10 weights...among which 9 weights are equal. In how many least possible comparisons can you isolate the weight which is not equal to the others.

Sawarnik

3?

Hawk

okay...how?

Sawarnik

i knew this too :p

Hawk

13:04

ok another one...

there are n machines which make 1 gram coins.

among them one machine has become faulty... and is producing 2 gram coins.

there is another scale that can measure the weights of the coins

how can you isolate the faulty machine with weighing the coins just once on the weighing machine

Sawarnik

Umm...I dont know that :|

Parth Kohli

NZ

Hawk

ok...so solve that

i think you will find this one challenging

Sawarnik

over challenging :| with just one weighing!

@ParthKohli SL bat. Some hours later, SL win.

Parth Kohli

@Sawarnik yes.

Sawarnik

13:09

@Hawk give me hints.

Sush

SK & PK here!

Hawk

you can mark the machines as 1,2,...,n

that is the maximum hint i can give you

Parth Kohli

I know this one.

But probably because it's been used way too much hehe.

Sawarnik

@Sush :) Which city are you from?

Hawk

@ParthKohli then you can tell him the solution when Sawarnik gives up

Parth Kohli

13:11

@Hawk all right.

Sush

I am from Gujarat, India. I think you both SK & PK too, from INDIA, right?

Parth Kohli

@Sush Yup!

Sush

@Sawarnik, @ParthKohli

O nice,

Sawarnik

@Sush Class? CBSE?

Sush

I find here many Indians daily!

Sawarnik

13:12

We are 1.2 billion in numbers!

Sush

No, am undergrad economist :)

Sawarnik

Oh! Good.

Parth Kohli

Wasn't like that a year back. Jayesh was the only one in chat. hehe

Jayesh Badwaik

Sawarnik

Where is he now?

Sush

@Sawarnik, you are right, though perhaps the popularity of math.se in India is increasing.

Parth Kohli

13:14

Don't know.

Sush

I think Jayesh runs a school, heard on chat

Sawarnik

alexa.com/siteinfo/stackexchange.com India on 2nd after US!

Sush

One of my friend frequently posts on sports.se, but he has math phobia! Hope he too joins this chatroom!

Sawarnik

@Sush What kind of maths you like?

Sush

@Sawarnik, very nice info for an econ guy!

Sawarnik

13:16

Econ is heavily math loaded AFAIK.

@Sush ISI? Or DES? Or?

Sush

I like probability theory and game theory! Yes, econ is very math needy, but Indian system is not good, bro!

Hawk

@Sawarnik what is DES?

Sawarnik

@Hawk Delhi School of Economics?

Sush

@Sawarnik, HAHA, those dream schools! How do you know them?

Sawarnik

@Hawk I give up on that.

Hawk

13:18

@Sawarnik AFAIK there is no ISI at Gujarat

Sawarnik

@Hawk Why it has to be in Guj? Am talking about Ind!

Sush

@Hawk, are you too from India?

Hawk

@Sush yes

@Sawarnik point...

Sawarnik

@Sush I just know :D Which are you in?

Hawk

@ParthKohli would you tell sawarnik the solution?

Parth Kohli

13:20

@Hawk dinner

Hawk

@Sawarnik but why do they need to be in india too?

@ParthKohli ok...i am telling him then

@Sawarnik it was not as tough as you thought it to be...

Sawarnik

Because an average Indian will study in India.

Parth Kohli

1 coin from 1.

2 coins from 2.

Sawarnik

@ParthKohli Dinner at 7?

Parth Kohli

...

n coins from n

Hawk

13:22

@Sawarnik why do indians then go abroad for study then?

Parth Kohli

see how many extra grams you have

Hawk

@ParthKohli exactly...that is the solution...

Sush

@Sawarnik, they both offer masters and Ph.D. and am just bachlor :/

Hawk

my teacher gave me this question yesterday...took me 7-8 mins to think of the solution!

Sawarnik

You are a genius, I told you.

Hawk

13:23

@Sawarnik absolutely not i told you...it took 7-8 mins...atleast 2-3 mins more compared to the solution level

@Sush AFAIK ISI offers bachelors program too

Sawarnik

@ParthKohli That means the scales give me the exact weight?

Parth Kohli

@Sawarnik hmm?

Sush

@Hawk, it offers in statistics and perhaps also in maths, but not bachelors for econ!

Hawk

@Sush yes, that is correct...but they do not offer any masters course in economics but in qualitative economics.

Sawarnik

@Sush IIT D also offers bachelor for eco I think?

Hawk

13:29

@Sawarnik did you understand the solution?

Sawarnik

@Hawk the scales give me the exact weight?

Hawk

meaning?

yes...the scales give you exact weight of the coins

Sawarnik

@Hawk Then its cheating! I thought it didnt!

Hawk

why? i told you the scales gives the weight of the coins

Sawarnik

you did?

ok then.

Hawk

13:34

@Sawarnik i have another one which you might be knowing and its not that good..

Sawarnik

tell.

Hawk

there is a sequence of numbers...find the next number of the sequence.

$1,11,21,1211,111221,$

Sawarnik

watever the solution u are right that its not that good.

Hawk

@Sawarnik should i tell you the solution?

Sawarnik

ok

Hawk

13:42

the second element says how many numbers of which number is there...

like, the first element is 1...so the next element says there is 1 '1'.

so the second element is 11

Sawarnik

oh.

no one can think of that!

Hawk

ya...i told you...it is not that good!

@Sawarnik a little

Sawarnik

Ok bye :)

@Hawk Good.

Hawk

@Sawarnik ok bye

N3buchadnezzar

Hya

Anyone here?

Hawk

13:48

@Sawarnik btw, why did you ask?

Vrouvrou

@Sawarnik @N3buchadnezzar or @Hawk can you help me on deformation lemma and homology ?

Hawk

@Vrouvrou i think what you are asking is about topology...but i do not know about it

Vrouvrou

have you seen my question ?

Hawk

no, but you didn't post any link to the question

N3buchadnezzar

I am trying to work on this math.stackexchange.com/questions/733877/… question now

Vrouvrou

13:55

@Hawk math.stackexchange.com/questions/721961/deformation-theorem

Hawk

@Vrouvrou yes i told you, that i do not know about topology, never studied that

Vrouvrou

ok

but it's not topology

homology

Hawk

okay, as you can see, i do not know the difference between that.

Vrouvrou

ok thank you

Hawk

maybe daniel fischer, robjohn or pedro tamaroff know that and might be able to help you...they are in this room

Vrouvrou

13:58

@DanielFischer or @robjohn can you help me please

@Hawk thank you

Hawk

@Vrouvrou most welcome

N3buchadnezzar

Anyone here have acces to Wolfram, or full version of wolfram alpha?

Vrouvrou

@PedroTamaroff can you help me please

@N3buchadnezzar wolframalpha.com ???

N3buchadnezzar

@Vrouvrou That has a time limit for non paying users

Vrouvrou

ok

N3buchadnezzar

15:06

Nah, I hate searching MSE for integrals or problems

Darn impossible to find even i you know the porblem/question at hand. It should be possible to search after latex imho

Daniel Fischer

@N3buchadnezzar Try google with "site:math.stackexchange.com".

N3buchadnezzar

I was looking for a recent integral on the form $$ \int \frac{p(x)}{ \log x + q(x) \log x}\,\mathrm{d}x\,. $$ I thought it was a nice problem to give to calc1 students, but wanted to look up the q and p polynomials

Johan Larsson

15:29

What is the lingo notation for estimated/predicted value?

I naming a ~variable~

Sawarnik

@ParthKohli 18 for 2! Yahoo! I will win. :p :p

7 more wickets to get! :P

Parth Kohli

Oh yeah, no Anderson.

Sawarnik

Hee hee :) :P

Parth Kohli

You worry so much. NZ will win. :)

Sawarnik

No way.

Sl has good bowlers!

Vrouvrou

15:34

@Sawarnik or @ParthKohli can you help me on homology and deformation lemma ? please

Sawarnik

@Vrouvrou We are just high school students! We know nothing about that stuff.

Parth Kohli

@Vrouvrou I'm not too advanced. You should ask Sawarnik.

Sawarnik

@ParthKohli Are you out of your minds? Those are things which even Balarka hasnt touched!

Ah, Rod Tucker. I ll kill you!

Parth Kohli

:(

Out

Sawarnik

FiNally

After 3 appeals!

23-3!

Yay! :P:P:P

I ll win.

Parth Kohli

15:39

:(

But remember that it was actually for Ind vs. SL

Sawarnik

Ind will get out in semifinals don't worry, Sl will get through :)

Herath: 12 balls for no runs for 3 wickets! @ParthKohli Can you belive it? :p

HAHAHAHAHA. Herath, wow!

23-4!

:p:p:P

Parth Kohli

Wat

...

Williamson will win it for NZ.

Sawarnik

Hah...they ll collapse like cards!

5 more wickets! Remember its effectively 23-5.

Parth Kohli

I'm aware.

Sawarnik

Herath back!

Parth Kohli

15:46

on a hattrick'

lol

Sawarnik

Dont worry. He ll get the wickets/

Hah!

Parth Kohli

whoa

Sawarnik

23-5!

Parth Kohli

So many chase fails these days.

Sawarnik

Just look at Herath's figures!

Parth Kohli

15:49

4 for 1.

Nathan McCullum is a good tuk-tuk.

So he wouldn't get out, I'm sure.

Sawarnik

He ll get out in the tuk tuk too.

Parth Kohli

Let's see.

Sawarnik

The required run rate has climbed too!

NZ are doomed.

Parth Kohli

One more spinner.

Well.

Sawarnik

Yahoo!

33-6!

:P:P:P:P:P:P:P:P:P:P:P:P:P:P:P

Parth Kohli

15:57

33-7

...

lowest score in T20I lol

Sawarnik

Not now. Until they strike two more!

Parth Kohli

Three.

Sawarnik

Right.

Parth Kohli

Three wickets to win

Sawarnik

C'mon Malinga!

Or bowl out Herath.

Just hope Anderson doesn't race from the hospital!

Parth Kohli

16:00

he will

I hope

Williamson chilling.

Sawarnik

82 is still a long way to go, the RRR is climebing! NZ are more or less doomed, unless Anderson and Williamson produce a fairytale finish!

Parth Kohli

looks like Mills is another tuk tuk.

Sawarnik

tuk tuks get out easily. bring malinga or herath back!

Jessy Cat

Cricket?

Parth Kohli

Yes.

skullpatrol

16:05

Championship game?

Parth Kohli

Yes.

skullpatrol

:D

Sawarnik

@JessyCat How did you guess?

@skullpatrol T20 World Cup/

Parth Kohli

The only aggressive shot from Williamson, going for two runs only.

Here we go!

Sawarnik

They need to hit shots, otherwise the RRR is beyond control!

Hawk

16:09

The run rate was within control...just needed one run per ball, an easy target...but messed it up by trying to hit huge shots and getting the victory early...same old impatient mentality...

Sawarnik

But if they hit shots, they ll get out. So no choice now. I ll win :P:P

Hawk

whom are you supporting?

Sawarnik

@Hawk Nah, it was due to Herath's magic.

Parth Kohli

Kyle Mills lol

7 overs, 70 runs. 10 p/o

Sawarnik

@Hawk Me and Parth has a bet. I ll get x if SL get a higher position than Ind, and vice versa!

Hawk

16:12

first of all...what is 'x'?

Sawarnik

That's a secret!

skullpatrol

a secret variable

Hawk

second, how can sl get a higher position than ind in group stage? india has highest possible point

Parth Kohli

what

no one asked Mills to be clever. :(

@Hawk not group stage. the tournament.

if both lose semi finals, we'll see the position on the table.

Sawarnik

Why the hell no Herath or Malinga!

Parth Kohli

16:14

bad decision, very bad.

Hawk

@ParthKohli i am quite sure that you will win. first of all i hate sri lanka team...

Sawarnik

:P

Hawk

and second...india is a better team than sri lanka

Sawarnik

@Hawk Hating isnt a criteria for winning :p

Well, I dont like SL too.

Hawk

but i wish netherlands qualified...they were fighting very well

Sawarnik

16:15

But they are a better side.

So I am safer.

@Hawk RIGHT!

Parth Kohli

Good batting from Boult.

It's PK vs. SK!

Sawarnik

tuk tuk :p

wont help

Parth Kohli

The rest is Williamson's job, my friend.

Hawk

herath!!!!

what a bowling stat??!?!?!?

2

Sawarnik

@Hawk Hadnt you see that?

Parth Kohli

16:16

Williamson is kidding me.

Hawk

No, the match was running...but i just looked at the stats...wasn't watching the match

Sawarnik

Pk, he is helpless!

Parth Kohli

Coriander son is back in the bus. Stuck in Bangla traffic.

Sawarnik

HAHA!

Who told that?

Parth Kohli

It's a joke.

Sawarnik

16:18

Maybe he is, I really think so.

Hawk

Great shot!!

Parth Kohli

Nice, Williamson.

I want him to play the innings of his life.

skullpatrol

how much under ground betting goes on for these games?

Parth Kohli

Not more than other sports.

Sawarnik

@skullpatrol No one knows. Spot fixing is more common I think though.

Parth Kohli

16:20

Shouldn't have run that.

He's back.

And Boult is on strike.

Hawk

Herath is looking a li'll bit overconfident...

wish he gets a heavy beating

Sawarnik

Has anyone looked at Senanayke's figure. That's another classic!

Hawk

i didn't what was that?

Parth Kohli

Out.

Hawk

who?

williamson or boult?

Parth Kohli

16:22

Williamson.

Sawarnik

HAHA

Hawk

game's over...sl wins

Parth Kohli

I wish the other son comes in... Coriander son.

Sawarnik

@ParthKohli You are doomed :p

Remember what I had told all along :p

:P

Parth Kohli

Still not.

Sawarnik

16:23

Nah.

:P

Hawk

what happened to corianderson?

Sawarnik

HAHAH

Parth Kohli

This is like a Chain Kuli ki Main Kuli situation for Corey. :P

Sawarnik

Herath!

Parth Kohli

Oh well.

Sawarnik

16:23

My god!

@ParthKohli :P

Bechara Parth :P

Hawk

frankly...sri lanka win nothing less than cheating

Sawarnik

?

@Hawk He finger is in two halves maybe.

Parth Kohli

This was not the bet.

Sawarnik

Yeah, but

SL will keep

this form

and you WILL LOSE :pp

Hawk

coriandarson didn't bat...what more do you expect...

Sawarnik

16:27

@Hawk Ok, but that doesnt take any credit away from SL's bowling!

Hawk

one thing is more than assured...herath will not be in this form in the next match

Parth Kohli

Sawarnik, I will win if SL lose the semi-final.

Even if India lose it.

Sawarnik

Oh.

But dont worry.

The scorecard!

Parth Kohli

That 42 though.

He scored 70% of the runs.

At least NZ got half of the target. :P

Sawarnik

Have you seen such a scoreboard anyday!?

Parth Kohli

16:31

Netherlands.

Sawarnik

Was there a 42 in it?

Parth Kohli

No.

Sawarnik

I remember Gayle scoring 65, and the rest of the team in single figures.

Parth Kohli

Which one?

Sawarnik

It was the most unbelievable scorecard I had seen/

Let me search.

Just wait...coming in 5 mins.

Sawarnik

16:47

@ParthKohli Yea..back. YOu here?

Parth Kohli

@Sawarnik yes

Sawarnik

espncricinfo.com/ci/engine/match/356016.html

What you answered yes!

Parth Kohli

Sri Lanka again. :|

@Sawarnik no

Sawarnik

:D:D

See, Gayle not out 63..and the rest!

Parth Kohli

But they lost in the final that tournament. :P

Sawarnik

16:49

So what?

[But no prob, they ll win this one.]

Parth Kohli

k.

Sawarnik

NZ cant even chase 119! Told you, there's no one easier to beat :P

Parth Kohli

England, Australia, New Zealand used to be good.

Sawarnik

Dont forget West Indies!

Once upon time they were invincible!

Parth Kohli

17:13

They still haven't lost the T20 touch.

Sawarnik

Maybe.

Parth Kohli

Coaching

that is another stupid q.

Sawarnik

@ParthKohli Nah, it is good. The $-i$ one was the best though.

Parth Kohli

@Sawarnik dunno.

This technique is gold, though.

Sawarnik

Yup!

@ParthKohli Your geometry questions are easy though. [Is this remark insulting and against site rules?]

Parth Kohli

17:29

@Sawarnik no

there's only one geometry question.

Sawarnik

Oh!

Parth Kohli

and "you couldn't do this one ?!?!" is pretty much an insult.

Sawarnik

Wat?

Parth Kohli

your comment.

just don't say anything like this on main and you're good.

Sawarnik

I was just surprised that it was easy and you couldnt solve it.

Whats the insult there?

@ParthKohli You could have replied coolly?

@ParthKohli Why does everything to you look like an insult?

Unfriendly behavior.

@ParthKohli Which paragraph you want me to read?

@ParthKohli What according to you is an insult? I ll avoid saying it to Mr. P.K.

Chris's sis

17:49

Greetings

Transcript for

$Mathematics$ Mathematics