## AGCA: HBT Proof and a sweet Bijection.

### August 27, 2010

It’s becoming a bit more difficult to write these, with grading and homework taking up much of my time, and I no longer am officially "taking" AGCA for credit.  Nonetheless, it’s an extremely interesting topic, and I’m going to go along with it for as long as I can.  I should have noted in the previous post: a ring $R$ will always mean "commutative, with unit."