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Anonymous
8:00 AM
But first of all I need to improve my knowledge of IOT and physics related to antennas and power transfer. I did find a few good books.
 
@Kaumudi.H back so soon? :-)
 
Yes, I had gone out to acquire the physical copy of my license, in addition to returning that book to the library, seeing as I'm leaving in three days.
I also did something quite obviously un-girly. Do you know about the method of threading?
 
@Kaumudi.H Yes, though I have never done it myself.
 
Well, I did it today because my eyebrows (used to) have the shape of a stick.
@JohnRennie Ah :-(
 
8:15 AM
@Kaumudi.H Congratulations ... I guess. I have no strong views on eyebrow threading.
 
No, me neither :-P Congratulations are out of order; that was just completely random information, really. It was the first time in my life doing it, and it was exceedingly painful.
 
@Kaumudi.H that's OK, I have plenty of spare laptops to send her. Now you begin to understand why I'm always buying laptops :-)
 
@JohnRennie :-) To serve the needy! That is, of course, one of the primary purposes of existence of the vengeful kindhearted Laptop Man!!
 
@Kaumudi.H don't eyebrows grow out in a couple of weeks? Your eyebrows will look great for two weeks then back to normal.
 
@JohnRennie Yes, that is what will happen. I don't think I'll be going back :-P Like I said, I did it on a whim. All my friends who are girls do it quite regularly and this naturally lead me to wonder about my own eyebrows.
 
8:19 AM
@Kaumudi.H I'll probably end up giving her the new one I just bought for my own use. Oh well, I'll just have to buy another :-)
 
It was painful too!!
 
I had my armpits waxed once and that was exceedingly painful. It gave me a new appreciation for the suffering women undergo in order to look more beautiful than other women.
 
@JohnRennie Ah, damn, wasn't that one particularly great?
@JohnRennie Your armpits?! Whatever for, may I ask?! :-o
 
particularly great - that's why I'll give it to my niece :-)
 
Ah, haha, right :-) Generous and selfless as always, Mr. Laptop Man!
 
8:22 AM
@Kaumudi.H it was when I worked for Unilever. The deodorants group wanted to culture the bacteria that grow in the armpit hair roots to study them. The idea was for volunteers to get their pits waxed and they would sample the roots for bacteria.
 
Oh, my!
What did they find out about those bacteria? x'D
 
It turned out the waxing process contaminated the roots with bacteria from the waxing strips so the whole thing was a waste of time.
 
did you volunteer?
Oh you did
Also hello!
 
@JohnRennie Oh, my God. That's quite sad, actually :-( I wouldn't have volunteered!
@Slereah Hi :-)
 
Only 3 days left of that dumb web development project
Hopefully I can finish without killing everyone involved
Group projects truly are the worst
Especially when groups are formed under the idea of making groups "balanced"
ie putting good students (ie me) with bad students (the other dummies)
 
8:30 AM
@Kaumudi.H I volunteered because I was curious to find out what having your pits waxed was like. I discovered it was painful :-)
 
Were they silky smooth afterward
 
@JohnRennie Geez!
Where was your common sense?! I would've ran away!
@Slereah Amen.
 
@Slereah smooth as a baby's arse
Apart from the scabs where the waxing had torn the skin and caused extensive bleeding
 
> extensive bleeding
Gosh :-(
 
I exaggerate. But where each hair was pulled out it left a spot of blood and then a scab.
I'm told that if you're waxed regularly the hairs become thinner and pull out more easily so the waxing gets less painful with time.
 
8:37 AM
Hiii @JohnRennie
 
Morning :-)
 
Morning
Can you help in C @JohnRennie
 
Well, I know C ...
 
Till what time will you be here
 
For about an hour
 
8:48 AM
-1
Q: How to avoid the last drop of pee (physics approach)

PhystherSince I was a child, I lived with a saying that my father taught me: "Well, son, you should know that the law of Archimede says that no matter how much you shake, the last drop will always go in your pants". Years later I became an engineer and every time I'm in a public bathroom and see how each...

what lol
 
okay @JohnRennie
Can you please explain me what is testcases
Note: I am begginer
 
Slang term for testicles?
 
actually it is written "First line contains the number of testcases"
 
I don't think test case has a specific meaning in programming. If you've written a program to do some calculation you'll probably want to test it with some input data for which you already know the answer. If so you'd probably call that a test case.
@Koolman I'd need to see the whole document to know what was meant by testcases in this context.
 
@JohnRennie
 
8:57 AM
@SirCumference ahahah absolutely love my character
 
@Koolman Ah OK. In this case I think testcase means a set of initial conditions e.g. Arya and Winterfell's initial position. Presumably you're supposed to do some calcultion for each set of initial conditions.
 
@Avantgarde Damn son where'd you find this
 
It was posted about an hour or so ago
 
I was posting a meme
It's a fantastic question
@Avantgarde hey you like hospin
or hopsin whatever the f his name is
 
Who's that?
No, never heard of him
 
Better be good. I'm pausing my metal
 
Watch it in full
It's damn good
 
@JohnRennie should I send you the whole question
 
Oh that guy puts reviews of underground metal and some rap albums (that I know of)
 
he's the melon man
and that's his shitposting channel
the best teeth in the game
 
9:14 AM
the melon man?
 
@BernardoMeurer You mean 'I've literally gone' instead.
 
yeah anthony fantano's nickname is "melon man"
 
@Jasper Whatever
 
Hello @BalarkaSen. Were there any more flags last night?
 
Flags?
 
9:17 AM
lots of drama in the math room. i can't keep up with that shit
head mod Jon Ericson came in to warn a couple people
also s h o g
 
@JohnRennie
 
@BalarkaSen I see. Best to ignore some users completely.
@BernardoMeurer Flags in some other rooms.
 
Good idea
 
Oh huh, interesting nick
The album I'm listening to now has this cover
 
noice
 
9:23 AM
Do you watch horror? Any good one you know?
 
Man horror is my jam
what kind do you like
 
@Avantgarde Yes. Watch Wrong Turn 1,2,3,4,5,6.
 
Kinds? You mean supernatural, etc? I don't know much about the subgenres. Just give me something that you loved
 
@Avantgarde Alright, I can think of a couple I loved. Do you want to get super scary surrealist horror or watch a psychological downward spiral?
 
@Jasper It's good? Looks like one of those franchises, like Final Destination
@BalarkaSen The first one
 
9:26 AM
@Avantgarde Eraserhead
 
Suppose people ignore the yuck factor, I wonder if biology se is a better home for this question
-1
Q: How to avoid the last drop of pee (physics approach)

PhystherSince I was a child, I lived with a saying that my father taught me: "Well, son, you should know that the law of Archimede says that no matter how much you shake, the last drop will always go in your pants". Years later I became an engineer and every time I'm in a public bathroom and see how each...

 
@Avantgarde It's about deformed cannibals torturing and eating humans.
 
@BalarkaSen Hm, I think either you've told me about it before, or I've seen that poster somewhere else before..
 
I don't think I have mentioned it to you before
It's by ya boi David Lynch
imo his best movie
 
@Secret WTF!
 
9:28 AM
@Jasper Okay well, I actually would like something to do with supernatural stuff
Jun 22 at 14:30, by Balarka Sen
In that genre, here's a few: Erasorhead, Videodrome, Naked Lunch, Dear Ringers, Hellraiser, Enemy.
 
@Kaumudi.H Hi, I think it should be 'run' there instead. =D
 
Yes you have @Balarka :P
damn, I have a lot pending lol
 
@Avantgarde Oh, then I think Final Destination 1,2,3,4,5 is good.
 
those are all my favorites
absolutely loved the recent movie Enemy
 
9:30 AM
@Jasper I think I've seen parts of a few of those
I need to befriend someone with Netflix
 
Fun fact: While I am suceptible to the yuck factor, I can ignore some of them if necessary. Having said that, I still don't feel like eating fried bugs
 
@Avantgarde Netflix has none of the good stuff
 
Claim: Any yuck factor I cannot ignore are those that myself found yuck, but not necessary anyone else
 
sorry to break it to ya buddy
 
The fact that sometimes politeness customs of the society is such a hindrance to some of my goals is one reason I sometimes disregard them
 
9:36 AM
@Secret Genuine kindness is more important than superficial politeness.
 
my goals being quest of knowledge related, lol
 
@BalarkaSen :(
Still waiting for spotify to be here
 
@Jasper That is absolutely true, this is why I seldom act polite to most people and only people can tell me what my kindness are
I found polite mannerisms in some meetings very pointless and redundant
 
@Secret I find handshakes extremely stupid. Besides, I have sweaty palms and don't like shaking hands.
 
Well, there does exists advices that sweaty hands can avoid shaking hands
And for me, I just told other people I am on medication and thus I cannot drink alcohol
(Not that I ever liked the taste anyway)
 
9:38 AM
You just have to tell them you don't drink.
 
How do people react to that?
 
Alcohol tastes terrible.
 
@Avantgarde You can find Dead Ringers on youtube.
Fully available in high quality
A very good movie in my opinion.
 
They are quite understanding. Nowadays, most conferences have soft drinks to cater those who cannot use alcohol for socialisation
and my favourite being apple juice
 
@BalarkaSen Aw yes, found it. You made my Saturday
 
9:40 AM
@Secret When did conferences ever have alcohol?
 
Some large conference in science fields prepare a host of drinks and food for the participants
 
@Secret Apples grow in the fields, so after drinking apple juice you can do field theory.
 
@Secret Apple juice is pretty good
 
@Avantgarde This one, just to clarify
 
@BalarkaSen Yes, I got that one
 
9:42 AM
Cool
Hm, I wonder if one can classify "Stalker" as horror. It is pretty terrifying :P
I think I have actually seen posters of it calling it a piece of Russian horror
 
The plot description looks great
 
for which
Stalker?
 
yes
 
@BalarkaSen the film of the Strugatsky's book?
 
@Avantgarde This wonderful movie has been uploaded recently on youtube here with high quality.
 
9:57 AM
More than 2.5 hours long!
 
that shit's perspective-changing
@JohnRennie yeah but Tarkovsky said he actually deviated a lot from the Strugatsky novel
(I haven't read it, actually)
 
Thank you! This is good. I guess, then, a couple of old movies would be there on youtube?
 
@BalarkaSen he must have. The book isn't horror in any sense. It's just a really good scifi book.
 
I suspect so
I enjoyed "It's Hard to be a God"
 
Actually I wasn't so keen on that. To be honest "Roadside Picnic" is the only book of theirs I really liked.
 
10:00 AM
@Avantgarde I suppose so!
 
@Avantgarde Longest movie I watched is Titanic (1997), more than 3 hours.
 
It was 3 hours long?
 
I think Tarkovsky's movies are getting reuploaded because of the recent demonstration of his 7 masterpieces on London
also yep they are a bit long
 
Then you will love Devdas :P
 
pls no
 
10:01 AM
@BalarkaSen Is it really about a God?
 
It's about Stalinian totalitarianism in a planet of intelligent beings that has stopped developing past their colonial age
@JohnRennie I need to read Roadside Picnic someday
 
[Some notes on time travel]
Actually, if you think about it carefully in a special relativity perspective of travelling to the future: The future that you will end up has to be the future that is resulted due to your sudden disappearance from the world during that time of absence. That is, even if backward time travel is impossible in physics, one can never reach the future that is resulted from the presence of themselves,

Unless: You get someone to replace your role at key events in the history, thus maintaining that future for you to reach
 
@JohnRennie in that what is the use of constraints
 
@Koolman constraints? The question doesn't mention any constraints.
I have to go now. I may not be back until Sunday morning.
 
1 hour ago, by Koolman
user image
@JohnRennie
 
10:25 AM
@Koolman "what is the use of constraints?"
well, to avoid your program from having large inputs?
 
10:56 AM
@LeakyNun then how can we apply it to our program
 
you don't
they're just there to let you know the degree of optimization required
 
ok
can you help me in a program
 
how?
 
-2
Q: Graph programm in C

KoolmanI want to write a code in which i want to know how much time is needed to move from one point to another . Input 1) First line(input) is showing the maximum time required to reach 2) Second line(second and third input) shows the intial position. 3)Third line(fourth and fifth input) shows ...

@LeakyNun this one
 
Show me the program you now have, after applying the corrections as suggested in the comments
use Ctrl+K to show a code
 
11:01 AM
#include<stdio.h>
#include<stdlib.h>

int main()
{
int c,d,e,f,b,a;
scanf("%d",&a);
printf("\n");
scanf("%d",&b);
printf("\n");
scanf("%d",&c);
scanf("%d",&d);
printf("\n");
scanf("%d",&e);
scanf("%d",&f);
printf("\n");
int g,h,i,j;
scanf("%d",&g);
scanf("%d",&h);
scanf("%d",&i);
scanf("%d",&j);

int k,l,m,n,o;
e-c==k;
f-d==l;
if(k>=0&&l>=0)
{
m=k*h;
n=l*i;
}
else if(k<=0&&l>=0)
{
m=k*g;
n=l*i;
}
else if(k>=0&&l<=0)
{
m=k*h;
n=l*j;
}
else
{
m=k*g;
n=l*j;
}
o=m+n;
if(b>=o)
{
printf("\n %d",o);
}
@LeakyNun
 
press Ctrl+K.
@Koolman press Ctrl+K before sending your code.
 
@LeakyNun it is coming like this only
 
then press Ctrl+K twice
paste your code to pastebin and send the link here
also, you haven't corrected the line e-c==k
 
What is wrong in that
 
tell me what it is supposed to do
and why is there no indentation...
 
11:11 AM
@LeakyNun it is just to make easier by introducing a new variable
 
@Koolman which variable?
 
ohh should I use k = e - c
 
yes
 
I am using this input of first test case
then why I am getting "Valar Codulis"
@LeakyNun
 
what did you get?
 
11:18 AM
"Valar Codulis"
 
what should you get?
 
because you should use = instead of ==.
 
got it
Thanks a lot
@LeakyNun If I want to use second test case then should copy paste the previous test case or is there any other good method
 
you should use a for loop
 
11:31 AM
you mean "for" loop
 
yes
 
I should run for loop till where
I am starting it after scanf("%d",&a);
@LeakyNun
 
I smell C
 
Yup
 
11:49 AM
@Koolman till the end
 
i got that
but I Want to print the result simultaneously of the testcase
@LeakyNun for that what should I do
 
#include<stdio.h>
#include<stdlib.h>

int main()

{
int c,d,e,f,b,a;
scanf("%d",&a);
printf("\n");
int s;
for(s=1;s<=a;s++)
{

scanf("%d",&b);
printf("\n");
scanf("%d",&c);
scanf("%d",&d);
printf("\n");
scanf("%d",&e);
scanf("%d",&f);
printf("\n");
int g,h,i,j;
scanf("%d",&g);
scanf("%d",&h);
scanf("%d",&i);
scanf("%d",&j);

int k,l,m,n,o;
k=e-c;
l=f-d;
if(k>=0&&l>=0)
{
m=k*h;
n=l*i;
}
else if(k<=0&&l>=0)
{
m=k*g;
n=l*i;
}
else if(k>=0&&l<=0)
{
m=k*h;
n=l*j;
}
else
{
m=k*g;
n=l*j;
}
o=m+n;
if(b>=o)
int main()

{
int c,d,e,f,b,a;
scanf("%d",&a);
printf("\n");
int s;
for(s=1;s<=a;s++)
{

scanf("%d",&b);
printf("\n");
scanf("%d",&c);
scanf("%d",&d);
printf("\n");
scanf("%d",&e);
scanf("%d",&f);
printf("\n");
int g,h,i,j;
scanf("%d",&g);
scanf("%d",&h);
scanf("%d",&i);
scanf("%d",&j);

int k,l,m,n,o;
k=e-c;
l=f-d;
if(k>=0&&l>=0)
{
m=k*h;
n=l*i;
}
else if(k<=0&&l>=0)
{
m=k*g;
n=l*i;
}
else if(k>=0&&l<=0)
{
m=k*h;
n=l*j;
}
else
{
m=k*g;
n=l*j;
}
o=m+n;
if(b>=o)
{
printf("%d",o);

}
else
{
printf("Valar Codulis");
 
what is this @Secret
 
int main()

{
int c,d,e,f,b,a;
scanf("%d",&a);
printf("\n");
int s;
for(s=1;s<=a;s++)
{

scanf("%d",&b);
printf("\n");
scanf("%d",&c);
scanf("%d",&d);
printf("\n");
scanf("%d",&e);
scanf("%d",&f);
printf("\n");
int g,h,i,j;
scanf("%d",&g);
scanf("%d",&h);
scanf("%d",&i);
scanf("%d",&j);

int k,l,m,n,o;
k=e-c;
l=f-d;
if(k>=0&&l>=0)
{
m=k*h;
n=l*i;
}
else if(k<=0&&l>=0)
{
m=k*g;
n=l*i;
}
else if(k>=0&&l<=0)
{
m=k*h;
n=l*j;
}
else
{
m=k*g;
n=l*j;
}
o=m+n;
if(b>=o)
{
printf("%d",o);

}
else
{
printf("Valar Codulis");
 
I mean why you have send yhis
*this
 
12:00 PM
Testing...
ok, nvm, it is ok now
 
@Secret can you help me in this
 
please use the sandbox for tests :-)
 
I will NOT help you on anything that show no effort!
 
I have made 95% program
what more effort you want
 
12:22 PM
8
Q: The physics behind the Starshade

HermanThe Starshade is a space telescope with a large occulter that can fly off and block the light of a star so its telescope can picture the surrounding exoplanets: I sort of understand the optics behind its shape; the light that bleeds around the edges their waves c...

bounty +100
expiring soon
 
@heather can you help me in C
 
@Koolman why me? did you just randomly ping me?
 
I thought you know C thats why
if you are free you can help me
 
what do you even want to do?
 
I just to make a program
 
12:37 PM
right, that does what?
 
pastebin.com/JgTLBBF7 In this I want to show the output simultaneously of diifderent testcodes
 
i'm not sure what that means
what testcodes?
 
Means running the program two times
@heather
 
what are you trying to output?
running the program two times to do what?
 
-4
Q: Graph programm in C

KoolmanI want to write a code in which i want to know how much time is needed to move from one point to another . Input 1) First line(input) is showing the maximum time required to reach 2) Second line(second and third input) shows the intial position. 3)Third line(fourth and fifth input) shows ...

This is the question
 
12:50 PM
first, use standard good programming practice and name your variables something other than letters of the alphabet
have you made the edits to code as suggested in the answer?
 
Yes I have edited them
Already posted the link
 
you still didn't name your variables well
 
That I will do next time , please solve my that problem
 
no, i'm not going to just solve a problem where you haven't really put any effort in to make it understandable to others.
i've scrolled through the transcript and you've pinged a half-dozen people to "just solve the problem" for you.
 
1:05 PM
@Koolman Maybe try your best and then post it as a question on the main site.
 
Hey guys! I have a very simple question I guess. I heard it is not allowed from quantum mechanics that three particles to be entangled. Is it right?
(Actually I saw in Susskind's lecture it leads to the AMPS paradox)
 
Anonymous
4
Q: three-particle quantum entanglement

user27515So I know that two particles can be entangled in a quantum way, but is it possible that more than two particles be entangled in a quantum way? Most descriptions provide with two-particles cases, so I wonder. (It's hard to think of three particles entangled in spin, or so.)

 
This is exactly what I saw before asking!
but it says it is possible
I again see in Maldacena talk and he said it is not allowed by quantum mechanics
 
Anonymous
A black hole firewall is a hypothetical phenomenon where an observer falling into a black hole encounters high-energy quanta at (or near) the event horizon. The "firewall" phenomenon was proposed in 2012 by Ahmed Almheiri, Donald Marolf, Joseph Polchinski, and James Sully as a possible solution to an apparent inconsistency in black hole complementarity. The proposal is sometimes referred to as the AMPS firewall, an acronym for the names of the authors of the 2012 paper. The use of a firewall to resolve this inconsistency remains controversial, with high-energy physicists divided as to the solution...
 
Anonymous
@mathvc_ Could you quote Susskind ?
 
Anonymous
1:13 PM
I haven't read his lectures
 
@Blue Let me refer to JM because it's easier for me
 
@Blue I don't see why not.
 
I got it FINALLY
 
"Since to have a triple entanglement, that doesn't seem to be reasonable lol"
 
1:19 PM
@Koolman Well done. Sometimes all we need is a little bit more time.
 
yeah
 
@mathvc_ to be blunt, this has been observed, so personally, I wouldn't listen to lectures of anyone claiming this, unless they can prove you'd get something that looks exactly like it
 
I mean he said clearly that triple entanglement is forbidden by quantum mechanics
I heard it from Susskind's lecture too
So I guessed it is an obvious fact that I dont know
 
@mathvc_ I have no idea what Maldacena is talking about. Whatever is supposed to be forbidden there, it is not the simple possibility of three particles being entangled.
 
@ACuriousMind He was trying to clarify the AMPS paradox
 
1:25 PM
So? That still doesn't make the statement correct.
 
I don't know anything about it! I'm asking. You know why AMPS is a paradox!
 
In fact, I don't know what the AMPS paradox is - are you talking about the black hole information paradox, to which the AMPS firewall is supposed to be a solution?
 
@mathvc_ you're missing the context - particles emitted from a black hole apparently can't be entangled with more than 1 other
 
@ACuriousMind yes
 
Actually, what does quantum monogamy actually mean, isn't that means 3 particles cannot be 100% entangled?
 
1:27 PM
@Mithrandir24601 apparently or fundamentally?
 
But we do have GZX states, so what is the rationale?
 
@mathvc_ theoretically
 
@Secret It means that if entanglement between A and B is maximal (by some suitable measure of entanglement) and if A and B are qubits, then they are not entangled with anything else.
 
@Secret monogamy principle. yup that's my answer! I found it here btw physics.stackexchange.com/questions/218085/…
 
So how does 3 particle entanglement obey monogamy?
like the GZX states
 
1:30 PM
@Secret I do not understand the question.
 
Give me a sec when I dig the correct name...
 
@Mithrandir24601 Actually, that makes no sense to me. Hawking radiation is thermal, so it's a multipartite entangled mess of a state.
I mean, it being thermal is precisely the problem since it carries no information!
 
In physics, in the area of quantum information theory, a Greenberger–Horne–Zeilinger state is a certain type of entangled quantum state which involves at least three subsystems (particles). It was first studied by Daniel Greenberger, Michael Horne and Anton Zeilinger in 1989. Extremely non-classical properties of the state have been observed. == Definition == The GHZ state is an entangled quantum state of M > 2 subsystems. In the case of each of the subsystems being two-dimensional, that is for qubits, it reads | G H ...
@ACuriousMind That's a three qubit entangled state
 
If the particles emitted would be entangled/correlated in pairs and other curious ways, there would be information coming out and there would be no paradox
@Secret Yes, I know what a 3q entangled state looks like.
What is the question?
 
@ACuriousMind I've never looked into it, but it apparently resolves some paradox about black holes
 
1:33 PM
@ACuriousMind How does that not violate monogamy since you have more than two qubits entangled (maximally?)
 
@Secret See the question mark behind "maximally"?
Please come back to ask this question after you have actually computed an entanglement measure for this state and the substates for two particles.
It's not entangled maximally, so it has nothing to do with monogamy.
@Mithrandir24601 Sure, if you claim that the radiation coming out is not actualyl thermal but carries information, then that will resolve the paradox alright! :P
::sighs:: This always happens when I talk about BH information with anyone - lots of very smart people have said lots of stuff about it that just seems so evidently silly to me. And it's all always weird handwaving :P
 
@ACuriousMind very true - it's been a while since I've done BH stuff, so I've forgotten loads of it :/
 
@Mithrandir24601 The black hole information paradox still lives on. There's no resolution yet, though things have gotten sharper over the years, especially the last couple of years
Oh, I see I missed a nice discussion here
 
@ACuriousMind do you know what is the topic I can study about quantum entanglement?
quantum information? or computation?!
 
I'm afraid I don't understand the question - there are probably many topics you can study that involve quantum entanglement
 
1:48 PM
okay! here I have to be accurate! I don't know anything about quantum entanglement. Do you know good books on it?
 
Well, do you know quantum mechanics?
 
yup
i'm a math student actually so I know a bit about quantum mechanics
 
Hey, I seem to recall that Stack Exchange had a board where people could post theories and get feedback. Is that still around or did I dream it up?
 
@mathvc_ As in, the formalism? Hilbert spaces, operators, expectation values and all that jazz? Because if you do, "entanglement" is not very mysterious - it's just a name for states that are not the tensor product of two states of a subsystem.
@MikeDoonsebury I'm 99.99% certain you dreamt that one up ;)
 
@ACuriousMind yup! But I'm pretty sure there are very good books specially for quantum entanglement. I'm not familiar with physics books and topics that's why i'm asking
 
1:54 PM
Well, I'm actually not really familiar with many books either, so I'm of no help to you :/
 

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