Scheimbauer, Claudia Max Planck Institute for Mathematics, Max Planck Society;
Johnson_Freyd_(Op)lax natural_oa_2017.pdf (Any fulltext), 732KB
Johnson-Freyd, T., & Scheimbauer, C. (2017). (Op)lax natural transformations, twisted quantum field theories, and "even higher" Morita categories. Advances in Mathematics, 307, 147-223. doi:10.1016/j.aim.2016.11.014.