2 Appendix

Structure

• Chapter 6: Retired Tags
  • Section 6.1: Expanded Tags
  • Section 6.2: Tags without Context
  • Section 6.3: Obsolete Constructions
  • Section 6.4: Tags Lost in Reorganization
  • Section 6.5: Reclassified Tags
  • Section 6.6: Retired Sections
  • Section 6.7: Temporarily Removed Tags
  • Section 6.8: Temporarily Retired Subsections
    • Subsection 6.8.1: Relative Homotopy Equivalences
    • Subsection 6.8.2: Covariant and Contravariant Equivalences