Regular obstructed categories and TQFT
arXiv:math/0202216 · doi:10.1063/1.1473681
Abstract
A proposal of the concept of $n$-regular obstructed categories is given. The corresponding regularity conditions for mappings, morphisms and related structures in categories are considered. An n-regular TQFT is introduced. It is shown the connection of time reversibility with the regularity.
22 pages in Latex. To be published in J. Math. Phys