Friday night...
...and I'm sitting in a cafe, drinking coffee and trying to understand K-theory. It's probably a sign that I'm a geek, that this seems to be one of the most wonderful ways possible to spend a Friday night.
Incidentally, since I know there are other geeks out there: Does anyone happen to have a good intuition for Bott periodicity, in any context whatsoever? (Topological K-theory, algebraic K-theory, cohomology, something else...) I'm feeling very stuck in not having a good intuition for why it works.
