This entry is about the article
John Baez and Michael Shulman,Lectures on n-categories and cohomology (arXiv)
in
John Baez and Peter May, Towards Higher Categories
higher category theory
cohomology
nonabelian cohomology
group cohomology
k-surjective functor
stuff, structure, property
Postnikov system
negative thinking
(-1)-category
(-2)-category