Skip to main content
3 of 3
http -> https (the question was bumped anyway)
Martin Sleziak
  • 4.7k
  • 4
  • 35
  • 40

Urs Schreiber has already addressed parts of this question here. There's lots of good stuff to mine through in the nLab entry on cohomology.

Kevin H. Lin
  • 21k
  • 10
  • 116
  • 190