Table of Contents:
  • Some abstract 2-algebra
  • More 2-algebra: Bending and smoothing
  • Some homological algebra of 2-modules
  • The algebras and algebra-modules
  • The cornering module-2-modules
  • The trimodules TDDD and TDDA
  • Cornered 2-modules for cornered Heegaard diagrams
  • Gradings
  • Practical computations
  • The nilCoxeter planar algebra.