lean2/hott/types/types.md

907 B

hott.types

Types (not necessarily HoTT-related):

HoTT types

  • hprop_trunc: in this file we prove that is_trunc n A is a mere proposition. We separate this from trunc to avoid circularity in imports.
  • eq: show that functions related to the identity type are equivalences
  • eq2: higher dimensional structure of equality
  • pointed
  • fiber
  • equiv
  • function: embeddings, (split) surjections, retractions
  • trunc: truncation levels, n-Types, truncation
  • cubical: cubical types (subfolder)