Subject: categories: lectures on n-categories and cohomology

From: John Baez <[email-masked]>
Date: Mon, 21 Aug 2006 23:54:42 -0700

Some of you may enjoy this:

Lectures on n-Categories and Cohomology
John Baez and Michael Shulman
http://arxiv.org/abs/math.CT/0608420

The goal of these talks was to explain how cohomology and other
tools of algebraic topology are seen through the lens of n-category
theory.  Special topics include nonabelian cohomology, Postnikov
towers, the theory of "n-stuff", and n-categories for n = -1 and -2.
The talks were very informal, and so are these notes.  A lengthy
appendix clarifies certain puzzles and ventures into deeper waters
such as higher topos theory.  For readers who want more details,
we include an annotated bibliography.