@Jim In our grad student seminar, we are encouraged to ask the speaker lots of questions. One prof pointed out that if all else fails, we can always ask "but what about the magnetic fields?" of pretty much any astro talk.

@Jim More seriously, are you stalking all the new Jims?

I know nothing about the internet, but are gravatars actual hashes of private data?

Surely it must be a non-injective map, right?

it took me about 5 seconds to figure out how to pronounce cochain

clearly been a while since I did anything categorical

I've actually studied more algebra than any other branch of pure math, but I know less of it than anything else.

@ACuriousMind Can my answer depend on Choice?

@Danu I remember Ron (and maybe Lubos?) arguing strongly that mathematicians shouldn't be using full AC, at least for physics things. Countable choice suffices.

In particular, you can dodge definable but non-measurable subsets of the reals.

@TAbraham Um... no. No problem here.

wow, you people are refreshing the site way too often :P

You know, I'm still angry about the latest "snow" here. Everyone swore it would be the storm of the millenium. Every governor and mayor declared martial law, saying they'd arrest anyone out of their homes. And now, 2 inches of accumulation later, it's all melting.

@TAbraham Central New Jersey, an hour out of NYC.

dinner time