### Quantization and Cohomology (Week 22)

#### Posted by John Baez

This week our class on Quantization and Cohomology was a bit slow-paced, in part because I was jet-lagged, but also because Derek Wise and Jeffrey Morton were gone, attending the Ottawa conference on traces. So, nobody taking the class knew much about principal bundles. Review time!

- Week 22 (Apr. 30) - Smooth functors and beyond. Review of what we’ve done so far. Principal $\mathrm{U}(1)$ bundles and phases in quantum mechanics. The need for nontrivial principal bundles in geometric quantization. Torsors.

Last week’s notes are here; next week’s notes are here.

Aficionados of this course will sense that today’s notes were not taken by Derek Wise. Instead, they were taken by Alex Hoffnung.

I think the UCR math PhD program should give one scholarship a year based on penmanship.

## Re: Quantization and Cohomology (Week 22)

The link is to the cohomology and computation notes!

:D