The h Bar

Abhas Kumar Sinha

04:23

@skullpatrol Actually plot twister is you and your brothers! XD

@skullpatrol You can I have same hat

user434058

06:58

@KyleKanos Please visit this chatroom.

Novalium Company

Moodgorning

Knight

07:11

@NovaliumCompany Let's to talk to @Knight . Come on Knight how do you doing?

@skullpatrol @skillpatrol Someone invited me to your house for new year party.

Novalium Company

@Knight Ok I should really stop talking to myself

Knight

@NovaliumCompany Thanks for random combination of words which you assumed I knew ahhahahahahah

@NovaliumCompany Are you also invited to @skullpatrol@skillpatrol home for New Year Party?

PM 2Ring

08:31

Surely there's a good dupe target that will help this OP: physics.stackexchange.com/questions/521741/… ...

Novalium Company

09:05

@Knight no :(

With reinforcement learning does the agent learn to perform the task only in the exact same environment or will it still perform if I tweak the env a bit? If a car has learned to park with reinf learning, will it still do so on another parking lot?

Secret

1

Q: Discrete spacetime: what does it mean for spacetime fields and vacuum?

Suppose we imagine that the space-time continuum is really a discrete stuff of something. This something could be some kind of particles or "substance"/matter/energy field. Then, I see two conceptual problems if we keep the broad picture of Nature made of quantum fields on a space-time substratum...

I must say, this is a really good answer to get some taste on what LQG is like

Having spent time studying the ontology of spacelessness and timelessness, I am more ready to deal with these weirdness. All that left now is the formal foundation I need to read up

Knight

09:41

1

Q: Why can't relativistic mass equation be put in Newtonian Gravitation equation?

According to special theory of relativity, we know that any equation that contains mass is corrected by $$ m\to \frac{m_0}{\sqrt{1-v^2/c^2}},$$ where $m_0$ is the rest mass. In the case of momentum, the classical momentum i.e. $mv$ we modify it by writing $$ p = \frac{m_0v}{\sqrt{1-v^2/c^2}}.$$ ...

special-relativity newtonian-gravity relativistic-mass

I request you to please see this post. Ruslan's answer is very nice but his answer in answering GEM theory not the Newtonian theory? Do you agree?

PM 2Ring

10:09

@Knight Relativistic mass is generally deprecated in modern treatments of special relativity. It's occasionally useful, if you're careful, and know exactly what you're doing. But otherwise, it can be misleading. It's less confusing to use relativistic momentum, which naturally incorporates the Lorentz gamma factor, and which is (of course) a vector. Relativistic mass "discards" the important direction information. For more details, please see:

56

Q: Why is there a controversy on whether mass increases with speed?

Some people say that mass increases with speed, some people say that the mass of an object is independent of its speed. I understand how some (though not many) things in physics are a matter of interpretation based on one's definitions. But I can't get my head around how both can be 'true' is an...

special-relativity mass speed mass-energy

Yuvraj Singh...

10:31

@PM2Ring hi.how are you?

PM 2Ring

10:52

@YuvrajSingh... I'm ok. I'm just playing with a number theory problem. How are you?

Yuvraj Singh...

11:25

@PM2Ring I am too fine.

@PM2Ring are you busy?

Kyle Kanos

11:38

@FakeMod there isn't a need for a simple-harmonic-motion tag because it's already encompassed by the harmonic-oscillator one. There is a way to make a synonym, but requires it to be used again

PM 2Ring

11:49

@YuvrajSingh... I'm cooking some rice, dhal, and vegetables. I'm just about to fry some spices...

Yuvraj Singh...

@PM2Ring OK we will talk once you complete cooking.

PM 2Ring

12:36

@YuvrajSingh... Ok. I've finished cooking. And eating.

dsm

Gonna post this here before making an official question, as it might be simple. I'm wanting to represent an arbitrary boost in the $\beta$ direction by doing a similarity transformation on the matrix boosted in the $z$ direction to a frame with axes $\{{r_1,r_2,\beta}\}$, allowing $r_1$ and $r_2$ to be any two mutually orthogonal vectors, as well as orthogonal to the unit vector $\beta$. So the transformation matrix is

$$R = \pmatrix{x\cdot r_1&y\cdot r_1&z\cdot r_1&0\\x\cdot r_2&y\cdot r_2&z\cdot r_2&0\\x\cdot\beta&y\cdot\beta&z\cdot\beta&0\\0&0&0&1} = \pmatrix{r_{1x}&r_{1y}&r_{1z}&0\\r_{2x}&r_{2y}&r_{2z}&0\\\beta_{x}/\beta&\beta_{y}/\beta&\beta_{z}/\beta&0\\0&0&0&1}$$

With

$$L=\pmatrix{1&0&0&0\\0&1&0&0\\0&0&\gamma&-\gamma\beta\\0&0&-\gamma\beta&\gamma}$$

The end desired result it the following, but it requires to me define $r_1$ and $r_2$ in terms of $\beta$.

Ahhh, that matrix is too big, bummer. Nevermind.

In any case, the $RLR^T$ matrix is only my desired result if I define $r_1$ and $r_2$ in terms of $\beta$, and not any two vectors, as the exercise states.

ACuriousMind

13:03

@dsm And your question is...?

PM 2Ring

@FakeMod Don't bother wasting time on him. He & his non-mainstream theory are notorious. See en.wikipedia.org/wiki/Mohamed_El_Naschie

dsm

@ACuriousMind it was too long, so I just posted it here. it might be a very dumb question, I really don't know

user434058

@KyleKanos Alright, so I saw that there is already a synonym named "shm", so maybe you can replace it by the full form synonym "simple-harmonic-motion", or... You can just leave everything as it is. I am equally happy with both the outcomes. The reason why I pinged you was because I don't have enough rep to do all this stuff, and you were the one who edited this. Thank you for replying :)!

PM 2Ring

From Wikipedia: John Baez [...] has called El Naschie's work "undisciplined numerology filled with impressive buzzwords"

user434058

@PM2Ring Hmmm!! One's own Wikipedia page, that's impressive.

user434058

13:11

But yeah, his theories... Unimpressive ;)

PM 2Ring

@FakeMod Indeed! You have to be a special crackpot to get one of those. We should feel privileged to have such an honoured guest. ;) Bob Lazar never posts here (AFAIK), but people who've heard about him on YouTube sometimes do so.

user434058

@PM2Ring Hahah!! The funny thing about Bob Lazar's Wikipedia page is that the first article in the contents is "Claims". I would expect a Wikipedia page showing one's research, discoveries and inventions rather than their claims.

PM 2Ring

El Naschie also has a RationalWiki page, but you don't have to be a special crackpot to get one of those. rationalwiki.org/wiki/Mohamed_El_Naschie

user434058

@PM2Ring Hope that people will one day look up to my(and hopefully yours too, if you don't have any yet) wiki pages rather than laughing at them :)

PM 2Ring

RationalWiki is good for this sort of stuff. They aren't as diplomatic as Wikipedia. They straight-up call Bob Lazar a pathological liar. I wouldn't trust him if he told me the sky is blue. ;)

Knight

13:23

@ACuriousMind You told that you play video games for amusing yourself, but ain't you think that a human body needs a little laugh just in the same way as it needs the food.

ACuriousMind

@dsm Hint: Did you use anywhere that $r_1,r_2,\beta$ are orthonormal yet? These are six equations (three normality orthogonality conditions and three normality conditions) and should help you to eliminate the $r_{ij}$ from your preliminary result.

PM 2Ring

@FakeMod I'm unlikely to ever have my own Wikipedia page. But that's ok. I wouldn't like to be actually famous. But I guess I do have a little bit of fame as PM 2Ring, since I've been using that name online (almost exclusively) for nearly 20 years.

ACuriousMind

@Knight Uh, sure. I don't exclusively play video games (but they can be funny, too!), I also have real-world friends with whom I do plenty of things, which may or may not involve jokes (usually terrible puns) :P

Knight

@ACuriousMind All that makes me to respect you is your matured talks, and always talking on topics and never off-topic. It's a great attribute.

user434058

13:43

@PM2Ring 👍

dsm

14:31

@ACuriousMind ah, ok, wasn't utilizing that. now I've eliminated all components except $r_{1z}$ and $r_{2z}$, but to get equivalence it requires $r_{1z}=\beta_x/\beta$ and $r_{2z}=\beta_y/\beta$. if I make that sub, all is well. however, isn't that telling me these aren't any two vectors, but ones that specifically have those $z$ components?

dsm

14:45

@ACuriousMind updated my post to include that simplicity

ACuriousMind

14:57

@dsm Are you sure you have used all conditions? They are six: $r_1\cdot r_2 = 0, r_1 \cdot \beta = 0, r_2 \cdot \beta = 0, r_1^2 = 1, r_2^2 = 1, \beta^2 = 1$. In the end, I would expect you to end up with not only $r_{1z}$ and $r_{2z}$, but also a relation between them - the two vectors are in a plane after all, and you cannot vary the z-component of one without varying the other.

Yuvraj Singh...

@ACuriousMind where does the light goes after it enters into back hole.

I got a pic

dsm

@ACuriousMind ok, hmm. let me think on this, because I'm spiraling into a hole of confusion, like that picture right there $\uparrow$

Yuvraj Singh...

15:12

@AaronStevens hello!

dsm

15:24

@ACuriousMind at the moment it seems like there's no getting around the fact that I need $r_{1z}=\beta_x/\beta$ and $r_{2z}=\beta_y/\beta$, but I must not be utilizing orthogonality to its fullest extent. gonna sleep on it, reassess. thanks for the input, as always. cheers

PM 2Ring

@YuvrajSingh... It goes to the centre of the black hole, just like anything else that falls into the black hole.

Abhas Kumar Sinha

@PM2Ring hello :)

@YuvrajSingh... it just stops there because time stops there and light wave need time to propagate further.

PM 2Ring

@AbhasKumarSinha Hello. I've been reading that Mr Tompkins PDF. It's rather quaint and old-fashioned, and some of the things he says are a bit misleading, but it's mostly enjoyable.

Abhas Kumar Sinha

@PM2Ring I've read that the GR part, most of the thing there written in the form of equation was incorrect, but, I enjoyed the story part.

@PM2Ring which part you are now? which chapter?

PM 2Ring

@AbhasKumarSinha Maxwell's Demon.

Abhas Kumar Sinha

15:37

@PM2Ring Ah, you are ahead of me.

@PM2Ring I'm at Cosmic Opera

PM 2Ring

I guess it was great for the time it was written, but it's probably not so good for the lay reader these days. There are too many things in it that could give people the wrong idea. But that's almost always the case when someone tries to write a pop-science article, even if they're an expert like Gamow or Hawking. OTOH, Feynman did a great job in QED.

Knight

@AbhasKumarSinha Don’t you talk to @NovaliumCompany anymore?

Abhas Kumar Sinha

@PM2Ring Agree, it's an old fashioned thing and many useless things from the perspective of science. QED was well written.

@Knight I talk him everyday, he's not now here.

@PM2Ring Surely you are joking and six easy pieces were also good compared to today's books on that.

Knight

16:01

@AbhasKumarSinha He (@NovaliumCompany) is a great guy.

Abhas Kumar Sinha

@Knight Agree :)

Yuvraj Singh...

16:43

@PM2Ring is it possible to take hybrid approach?

Like semi classical gravity.

Abhas Kumar Sinha

@YuvrajSingh... for blackholes?no.

@FakeMod I always confuse you with @Knight , they have same profile pic... :P

PM 2Ring

@YuvrajSingh... Well, it's not ideal. But sometimes you have to make compromises like that. Eg, Hawking radiation calculations use a semi-classical theory because we don't have a proper quantum gravity theory yet.

Abhas Kumar Sinha

@PM2Ring quantum gravity <3 I like these...

@YuvrajSingh... you've learnt semi classical theory? ! :O

user434058

@AbhasKumarSinha Maybe I will change that soon. I like trying out new stuff :)

Abhas Kumar Sinha

@FakeMod Changing hats is enough! :P

Yuvraj Singh...

16:55

@PM2Ring ook.

user434058

@AbhasKumarSinha I am a trustworthy guy. I don't do that ;)

ACuriousMind

yesterday, by ACuriousMind

@Knight Please don't joke about that - using multiple accounts can get you suspended quickly (and most of the accounts deleted) if you use them to do something you couldn't do with a single account.

Knight

@AbhasKumarSinha again a random combination of words (@NovaliumCompany)

Abhas Kumar Sinha

@Knight Lol, But, I'm sure for those three.

user434058

@Knight Why should I be invited to my party?

ACuriousMind

17:01

This plea goes for everyone - please stop trolling about sockpuppets.

Abhas Kumar Sinha

@ACuriousMind okay sir

@NovaliumCompany yo yo yo bro !!!!!

Novalium Company

yoyoo my fellas

ACuriousMind

→ 19 messages moved to Trash

Novalium Company

how ar3 holidays?

Knight

@ACuriousMind The matter is reputation doesn’t matter to us anymore, it’s all about learning new things form good people like you.

user434058

17:02

@ACuriousMind I am sorry! The jokes end here guys. I am exclusively FakeMod. I have no allegiance to any other user.

Abhas Kumar Sinha

@NovaliumCompany It's Holysh**days!

Novalium Company

@Knight Aww shtap iit

Abhas Kumar Sinha

@NovaliumCompany yes, awww, stap it

Yuvraj Singh...

@ACuriousMind multiple accounts from a single user is not good in chats.

Abhas Kumar Sinha

@YuvrajSingh... He's just talking to himself :P

@skullpatrol Yo pal!

Knight

17:03

@NovaliumCompany You will knight in @skullpatrol house.

Novalium Company

@AbhasKumarSinha I'm getting into AI :P

Yuvraj Singh...

That sound stupid!

Abhas Kumar Sinha

@NovaliumCompany I'm in!

Yuvraj Singh...

Only create non sense!

Abhas Kumar Sinha

@NovaliumCompany You are a rockstar bro!

@YuvrajSingh... dun worry, we were just joking :)

Knight

17:04

@NovaliumCompany what is AI meant here?

Abhas Kumar Sinha

@Knight AI account ! :P

Or a account being handled by a bot here in chat :P

Knight

AI account ?

Abhas Kumar Sinha

@Knight jk

@NovaliumCompany Yes bro, we wanna hear more?

Knight

@AbhasKumarSinha Do you want to talk to yourself?

Abhas Kumar Sinha

@Knight @FakeMod @NovaliumCompany yo yo yo

@Knight I talk everyday

Knight

17:06

@AbhasKumarSinha Is it knight in India?

Abhas Kumar Sinha

@Knight yes, dark knight!

Knight

@AbhasKumarSinha You should go for somebody’s company(novaliun comapny)

Abhas Kumar Sinha

@Knight I've no problem, he'd be keen to hire me as CEO

:P

Knight

@AbhasKumarSinha is your mind curious about who I’m ?

Kyubey

@ACuriousMind Can you tell me how to flag a comment?

ACuriousMind

17:09

→ 3 messages moved to Trash

Further inanity will lead to more severe consequences than a 1-minute kick.

Abhas Kumar Sinha

@Kyubey just flag it

@Knight I told ya

ACuriousMind

@Kyubey There's a flag icon on the left right under the arrow with which you can upvote them

Novalium Company

Noo, I mean, I'm getting into the field of AI more seriously. Understanding and learning to program AI systems.

Abhas Kumar Sinha

@NovaliumCompany Good news broOooooooo!!!

Knight

@ACuriousMind You are very cruel.

Abhas Kumar Sinha

17:11

@NovaliumCompany You are a professional man now!

lol

Knight

@NovaliumCompany Wow. Congratulations brother.

Novalium Company

@AbhasKumarSinha lol thanks 🤔😂

Abhas Kumar Sinha

@NovaliumCompany My bro <3

@Knight congrats? is he becoming husband! :P XD

Knight

@NovaliumCompany @AbhasKumarSinha He will become a very good programmer one day.

@NovaliumCompany His name will come in books.

Abhas Kumar Sinha

@Knight I'm too optimistic about his future.

Knight

17:13

His company name will Novalium

Abhas Kumar Sinha

@Knight In the history of AI

@Knight and CEO? LP

Knight

@AbhasKumarSinha you will be CEO

There will be a bar too in his company

Abhas Kumar Sinha

@Knight yes yes yes, buddy, you are learning....

@Knight yes The H Bar

Novalium Company

Awww guyzz

Abhas Kumar Sinha

@NovaliumCompany You are the Hero of AI, you'll bring a revolution

Knight

17:15

@NovaliumCompany Are you a family man?

Novalium Company

I actually wanna become Zbaiderman

Abhas Kumar Sinha

@Knight Yes we are his family :)

Knight

@NovaliumCompany What is Zbaiderman ?

Abhas Kumar Sinha

Exclusively for you bro,

*Here's to the crazy ones.

The misfits.
The rebels.
The troublemakers.
The round pegs in the square holes.
The ones who see things differently.
They're not fond of rules.
And they have no respect for the status quo.

You can quote them, disagree with them, glorify or vilify them.
About the only thing you can't do is ignore them.

Because they change things.
They push the human race forward.
While some see them as the crazy ones, we see genius.

Because the people who are crazy enough to think

Novalium Company

@AbhasKumarSinha Is much further into A.I

so will probably see him in books first

Abhas Kumar Sinha

17:17

@NovaliumCompany For you bro ^

Knight

@AbhasKumarSinha Please don’t write whole illiad here.

Novalium Company

Steve Jobs Bible.

Abhas Kumar Sinha

@NovaliumCompany Yes an AI to make quotes and motivate people, I bet the motivational speakers year $$$$$$, we'll capture whole market

@NovaliumCompany yes bro yes, cool bro

@Knight okay bro

Novalium Company

Zbiderman is a sick Spiderman

Abhas Kumar Sinha

@NovaliumCompany Yes, I now remember him

@NovaliumCompany no bro, do you remember Batman's Lab? (underground one)

We'll make one secret lab for AI and Company

Kyubey

17:20

@ACuriousMind Thanks! I think that the flagging option isn't available for mobile site (but I found it there when I opened the desktop site).

Novalium Company

@AbhasKumarSinha How did you start getting into AI?

Abhas Kumar Sinha

@Kyubey It should be there, I've done it :)

@NovaliumCompany I read a book, you wanna know it's name? Wait I'll find that for you.

@NovaliumCompany INTRODUCTION TO MACHINE LEARNING - Alex Smola and S.V.N. Vishwanathan Cambridge University Press.

I'm lucky enough to know S.V.N. Vishwanathan personally, he motivated me for AL and ML. :)

Novalium Company

Cool. I'm watching the crash course AI series and I'll start programming some cool AIs after I come back from my holiday trip

@AbhasKumarSinha coool

Abhas Kumar Sinha

@NovaliumCompany Take one in NPTEL by Prof. Gustaf, (most cited writer in AI :O) from feb.

@NovaliumCompany Holiday where?

Novalium Company

@AbhasKumarSinha I will get some practical experience and actually start coding some AI projects. I believe that's the best way to learn. But i'll also watch vids and read books.

@AbhasKumarSinha A city in Bulgaria

Abhas Kumar Sinha

17:25

@NovaliumCompany Good, first try on something like Scratch.mit.edu, then on Lower level language.

@NovaliumCompany cool :)

@NovaliumCompany If you can try, learn NLP too, that's my weakest part.

Knight

@NovaliumCompany Bulgaria? I have heard that’s very chaotic.

Abhas Kumar Sinha

@Knight no, that's because, bro lives there :P

Novalium Company

@Knight What do u mean chaotic?

Knight

@NovaliumCompany Do you live in Bulgaria? My mind is curious ?

Abhas Kumar Sinha

@Knight you'll again get f*****

xd

Novalium Company

17:29

@Knight yeah

Knight

@NovaliumCompany Chaotic means some rebel groups do some kinda battle with government

Something like that

Abhas Kumar Sinha

@Knight that's bolivia man

Bulgaria is in eastern europe and you are talking about bolivia which is latin

Novalium Company

@Knight Yeah, that happens sometimes. Bulgaria is like Russia but a bit less developed. (economically and socially)

Abhas Kumar Sinha

@Knight There are still chaos and coup tries in Bolivia

Knight

@NovaliumCompany Do you live in Bulgaria ?

Abhas Kumar Sinha

17:32

@NovaliumCompany So, do they like russia and ukariane?

Novalium Company

Any last questions cuz I'mm take a bath?

(shower)

Abhas Kumar Sinha

@NovaliumCompany Temperature of water!

Novalium Company

@Knight Yes

Abhas Kumar Sinha

It should be very cold there

It's -3 in JK here.

Knight

@AbhasKumarSinha what is BC?

Novalium Company

17:33

@AbhasKumarSinha yeah I guess

Abhas Kumar Sinha

@Knight no nothing.

Novalium Company

@AbhasKumarSinha The showers are warm lol

Abhas Kumar Sinha

@NovaliumCompany snow?

Knight

@NovaliumCompany Hoping to meet you some day personally

Novalium Company

@Knight Best Cucumber

@Knight Yeah why not

Abhas Kumar Sinha

17:34

@NovaliumCompany lol :P

Knight

@NovaliumCompany What?

Abhas Kumar Sinha

I too

Knight

Cucumber?

Abhas Kumar Sinha

@Knight That's some Hindi slang.

Novalium Company

I'mma go guyz sorre

Abhas Kumar Sinha

17:34

I'll meet @NovaliumCompany @skullpatrol @skillpatrol @Knight @FakeMod personally one day :)

:P

Knight

@NovaliumCompany Have a great bath..

@AbhasKumarSinha Is it paining after being kicked?

Abhas Kumar Sinha

@Knight Your in high school?

@Knight ...? no pain no gain

Knight

@AbhasKumarSinha yes

Abhas Kumar Sinha

@Knight good, let's meet after this shitty High school and so some startup.

Knight

@AbhasKumarSinha What level you are at?

Abhas Kumar Sinha

17:37

@Knight 12th

Knight

What?

Abhas Kumar Sinha

@Knight 12th grade.

Final year, high school.

Knight

Okay

Abhas Kumar Sinha

@Knight u?

Knight

@AbhasKumarSinha Preparing for University exams

Abhas Kumar Sinha

17:38

@Knight I'll take a drop, probably :)

Knight

@AbhasKumarSinha Drop of beer? ...

Abhas Kumar Sinha

@Knight Drop means, I'll wait one year for my Uni entrance Exams prep after High school.

No thanks I don't drink.

Knight

Oh

Abhas Kumar Sinha

@Knight What's your class? 12th or 11th?

Knight

@AbhasKumarSinha You can call it 12th

Abhas Kumar Sinha

17:41

@Knight oh okay :)

@Knight It's late night here, I've to go :)

I'm getting calls :)

Knight

@AbhasKumarSinha from whom?

@AbhasKumarSinha means?

@AbhasKumarSinha Go, I have to take care about my pain that I have got. from being kicked

Abhas Kumar Sinha

@Knight Good, have a good sleep, good night :)

Knight

@AbhasKumarSinha Good night brother

Abhas Kumar Sinha

@Knight Good Night bro :)

DanielSank

19:32

Hi, everybody.

@dmckee We have a little ducky in our office for this purpose.

watchme

19:54

Can a picture be analog? I mean, a signal can be analog, but I heard my sister say "yeah that portfolio on my computer is for the analog one (for the analog portfolio)" But thats not analog. Analog doesn't equal "real world". Analog is analog... right?

Loong

Old VHS video stills were analog pictures.

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