Diextensions et panextensions de catégories
AbstractConsidering some different notions of kernel for a quotient functor, news kinds of extensions of (small) categories appear. In each context, one sees how 2-cocycles are naturally defined. Classical 2-cohomologies, like Hochschild's one (for which the need of commutativity is here discussed), are particular cases in this framework. One has thus an unifying point of view for extensions structures.
How to Cite
Hoff, G. (2003). Diextensions et panextensions de catégories. MATHEMATICA SCANDINAVICA, 93(1), 23-40. https://doi.org/10.7146/math.scand.a-14411