The h Bar

@StanShunpike I came on here to ask a question but it turned out to not be interesting/I could answer it myself. Ch 7 of renteln Manifolds Tensors and Forms (I thoroughly skimmed ch 4,5,6 b/c they don't effect ch 7/8 much)

Stan Shunpike

5:54 PM

Hmmm havent heard of that one.

NeuroFuzzy

@StanShunpike I stumbled upon it. It's really good.

It talks about the connectionģforms/bundles/manifolds in abstract language

Connections/forms*

I was going to ask if the equation for the change of basis of the "connection matrix" omega'=A^(-1) dA+A^(-1) omega A could be applied to lie groups (since, eg, for a rotation group, A^(-1) dA/dt is your antisymmetric/angular momentum matrix) but I should answer that on my own

FenderLesPaul

trying to convince my professor to give a talk on the proposed Strominger/Hawking resolution of black hole information

but he's being too lazy

there is no justice in the world

obe

6:16 PM

There's no time in this world.

Just spacetime

only zuul

Huh?

Aug 8 at 20:56, by Slereah

Do you own a time machine

Stan Shunpike

Lol

FenderLesPaul

6:38 PM

zuul sounds like an ancient near east god

Slereah

" There's no such thing as fourth quantization, but if there were, it would be the same as the third-quantized one, due to the conformal symmetry. "

That joke always gets me

0celo7

7:02 PM

Over my head

FenderLesPaul

7:20 PM

fuuuck

I can't find my copy of Ender's Game

user54412

7:36 PM

@0celo7 I really like my Razer mouse, fwiw. (One of the simpler models, not the one with 50 buttons)

user54412

The hard to do but important thing with mice is to actually try them out yourself.

0celo7

How on Earth are you supposed to do that

user54412

@Danu I'm inclined to cast a delete vote myself. If the person had made it CW I'd be more tolerant, but getting reputation for posting a joke answer seems like the sort of forum-for-the-masses behavior we should strive to avoid.

user54412

@0celo7 Yeah. I don't know. I had a friend with the mouse I ended up getting.

user54412

It's actually a similar issue with headphones for me. It's hard to find most models except by buying them online.

user54412

7:48 PM

@Danu Well now I've given 5 downvotes and 4 NAA flags. I must be really humorless today.

user54412

user54412

^ Is this a new feature in the reputation menu?

user54412

Also, good to know the next tag badge the system thinks I should get is homework

NeuroFuzzy

@DanielSank I think you posted this old comment on the wrong answer, and meant to post it on vladimir kalitvianski's answer.

"A wave function is as objective as a photo picture of somebody. It encodes an objective information about something." Agreed, and since the amount of information available to different perspectives, the state vector is subjective by OP's definition. — DanielSank Feb 28 at 17:05

FenderLesPaul

8:05 PM

-1

Q: Is a black hole a gigantic atomic bomb?

Atomic bombs explode by compressing the fissile matter. Would it be fair to expect the same from the black hole - that is the matter compressed so densely that it explodes within the boundaries of its horizon? Except, we never can see that explosion since it is contained within the black hole its...

that's a scary prospect

DanielSank

@NeuroFuzzy thanks, fixed.

user54412

Black holes as atomic bombs? ::goes off to write DOE funding proposal::

Slereah

Mister president, space has weapons of mass destruction

Please fund an interstellar program

DanielSank

@ChrisWhite lol

0celo7

8:40 PM

@ChrisWhite Can lend future expertise

user54412

So I've received an email that looks like it was sent to lots of people (no personalization whatsoever, two guesses as to which country it's from), but it isn't asking for a favor, just for information, the sort I'm in a position to give (and have given to individuals who were clearly asking me in particular). I'm torn as to whether or not to reply.

Danu

@ChrisWhite I approve

@ChrisWhite Yeah, and I like it

I'm pretty close to copy editor

user54412

Only 36% of the way there

Danu

@ChrisWhite Lazy! :P Then again, only 11 people have it so far

user54412

One of these days I'll get around to research assistant.

Danu

8:52 PM

@ChrisWhite Silver ain't worth nuttin' to me, yo

user54412

But only 2 have been awarded :P

Rigor

Have you ever visited Einstein's house?

user54412

@Rigor Me? I actually don't even know which one it is.

user54412

Then again, you shouldn't expect a grad student to get out much.

user54412

Just last week, after living here for 4 years, I found there is a nature preserve a mile from my apartment.

Rigor

8:57 PM

lol

Danu

Let's purge all the joke answers ^^

Rigor

What would life be without jokes?

Danu

A better repository of knowledge

user54412

I've given out 9 downvotes today. Apparently this is what job season does to people.

user54412

9:13 PM

@Qmechanic Just in case you didn't notice when commenting on their posts, this new user has given 13 answers in quick succession that all point to their blog. Since they all contain extra information as well, I don't necessarily see anything wrong, but it might be good to keep an eye on their activity.

user54412

(btw, do you have a script that looks for "my blog" from new users or something? And does that person have a script for replying to your posts?)

Danu

@ChrisWhite I got to -6 on just answers :P

@ChrisWhite I flagged all of them as spam :P

Danu

9:43 PM

@ChrisWhite what do you think about my comment: physics.stackexchange.com/questions/205370/…

Qmechanic

@ChrisWhite : I was made aware of the answers by flags. No, I don't have a script. My repeated messages were meant as an indirect warning to the reader of possible spam. High rep users are urged to vote-to-delete non-answers.

Danu

So... what about these answers:

92

Q: How can you weigh your own head in an accurate way?

I read some methods but they're not accurate. They use the Archimedes principle and they assume uniform body density which of course is far from true. Others are silly like this one: Take a knife then remove your head. Place it on some scale Take the reading re-attach your head. I'm looking for...

mass everyday-life measurement home-experiment

@Qmechanic I think it's definitely spam; perhaps taking action against the user would be wise.

Rigor

What kind of action?

Danu

Guys, over at TeX - LaTeX they have this (weekly?) session called "answer the unanswered" which means a bunch of (serious) users get together in chat and try to answer a whole bunch of questions that have either been answered in the comments, are easy to answer, etc; sometimes they also vote to delete an old unanswered question that is deemed too bad. What do you guys think about potentially doing this here on PSE?

5

Rigor

Isn't that what those "chat sessions" are supposed to be about?

Danu

10:02 PM

@Rigor No, definitely not

Rigor

Make one :-)

Or better still make a separate room.

Math does it that^ way