nLab opposite 2-category




A 2-category KK has three different opposites (two independent):

  • The 11-cell dual K opK^{op}, in which the 11-cells but not the 22-cells are reversed.
  • The 22-cell dual K coK^{co}, in which the 22-cells but not the 11-cells are reversed.
  • The bidual K coopK^{co op} in which both 11-cells and 22-cells are reversed.

Last revised on September 28, 2022 at 14:43:28. See the history of this page for a list of all contributions to it.