Interstellar

Does anyone knows any mathematica package for calculating in-in formalism Feynman diagram ?

I think it is really hard to say if someone had learnt all of GR.

@DIRAC1930 how do you define "learn GR" ?

@controlgroup lol

wouldn't be surprised if it is written by Bilbo :P

@JohnRennie pretty J.R.R. Tolkien

hello

btw no need to be aggressive, i mean no harm

sorry

I think you are right about the part where every theory has its own merit

my bad

@JohnRennie i suppose you are right

@bolbteppa the problem is that too much people are on the direction of steering away from reality

@naturallyInconsistent what does the "mew" mean ?

@naturallyInconsistent anyway you are correct, just write out the nabla and there will be no confusion

btw I think Ads/CFT is not completely useless in real life, they might help us understand black holes in our universe better

people might start doing de-Sitter again

if someone find a new method towards de-Sitter space or find a new pragmatic aspect to do research on

so there is still hope

there are people doing physics on de-Sitter

but I still think string theory on de-Sitter space can be a very promising candidate for quantum gravity, it is just that not a lot of people are working on it.

okay i forgot who state this lol :P

so it is much harder to write an essay on de-Sitter space and a lot of them turn to anti-de-Sitter space

because de-Sitter space is much more harder than anti-de-Sitter space

@DIRAC1930 if seen someone in the chat stating that they don't dare to do research on making string theory more pragmatic for the fear of losing their job

@naturallyInconsistent so is this indeed taking covariant derivative twice ?

because they substitute something with the covariant derivative into a formula with a covariant derivative and arrive at the result

and from the content it looks like it have something to do with taking covariant derivative twice

@Slereah no it actually looks more like this: ${A^{\nu;\mu}}_{\mu}$

(in my book the lower index $\mu$ is behind the upper index $\mu$)

guys I come across a notation $A^{\nu;\mu}_\mu$, what does that mean ? taking covariant derivative twice ?

they thought:"wow ! terminator is comming true ! so it must be really smart ! "

@SirCumference they mistake ChatGPT for some super artificial intelligence in the sci-fi movie like skynet in the terminator i suppose.

yup, build from the prerequisite is the best choice

@Feynmate I wasn't reading carefully enough :P

in case you live in different time zone, good morning, good evening and good night :P

and I think if you don't know about the stuff, it is easy for you to be misguided by LLM @fqq

@qwerty it simply means attracting wealth

or certain part of the website

it has a function of making certain button vanish

@Slereah no i mean certain area of the website

now i am working to block AI button on all SE websites :P

@Slereah iron and sulfur ? i'm not sure what that means :)

so I could simply get rid of that button

luckily i get an ad blocker that can block elements on a website

and also other SE

and find PSE the better choice

I come to this site because every LLM I have tried failed me

I don't even want to play around it

if you want AI, ChatGPT, Gemini, Grok or Deepseek is so obviously better choice