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William John

3:02 AM

What was before big bang

and what was before it

and so forth

existence doesn't make sense

3 hours later…

John Rennie

6:07 AM

@WilliamJohn Have a read through my answer to this:

Q: Before the Big Bang

I've heard this saying before I don't know about anyone else. It says, "What ever was before the Big Bang is something physics can't explain..! Is this saying true (accurate)?

5 hours later…

Slereah

10:42 AM

Eastern European mathematicians are really all over that higher order G-structure thing

Slereah

11:40 AM

Wait a minute, I think there is a theory if the G-structure is just $e$

That's what teleparallel gravity is

Slereah

12:38 PM

Yeah $\nabla e = 0$ is the compatibility condition for a trivial group I think

3 hours later…

Korra

3:29 PM

Hey

Can someone suggest an astrophysics reference which covers tov equations with examples and exercises?

6 hours later…

peterh

9:23 PM

What if there is a particle for which can self-interact while violating energy conservation. It would be some like a glider gun in Conways' Game of Life

1 hour later…

Physics Meta

10:26 PM

Q: Why was this vector calculus question closed?

I just came across this question, which was closed under the site's homework policy. However, I fail to see how it is related to a specific calculation or is "check-my-work-like". While it does refer to a particular sort of expression, it seems to me that it mostly focuses on its physical meaning...