Stack Exchange

Stack Exchange is an index to a collection of question - and - answer sites that cover a range of topics as varied as general physics, Ubuntu, Wordpress, cooking, photography and many other subjects attractive to geeks and nerds such as myself. Why do we think there are only three generations of fundamental particles? Who knows? Suppose that $g$ is a bijection on the real line, and $g^{-1}\circ f\circ g$ is a $C^\infty$ function whenever $f$ is $C^\infty$. It seems howlingly obvious that this can only happen if $g$ is …

Well, I'm fairly sure you don't need me to explain that.

The good thing is, that unlike just about every similar site out there, there's no registration required, not even for free. Just ask your questions. And there seem to be some really good answers and problem solvers here.

If you acquire a reputation for utility and knowledge, you'll also acquire points that give you some extra goodies, such as the ability to create new tags and take part in chat.

Definitely worth a look if you need to know how forgiving you need to be on new employees, or what you can do with frozen eggs (both genuine questions), and "throw them around" hasn't been a successful answer for either, so far.