Projective and injective objects in symmetric categorical groups
Category Theory
2010-07-02 v1
Abstract
We prove that the 2-category of symmetric categorical groups have enough projective and injective objects. This was conjectured by Bourn and Vitale in 2002 and was anounced recently by Fang Huang, Shao-Han Chen, Wei Chen and Zhu-Jun Zheng in arXiv:1006.4677 with wrong proof.
Cite
@article{arxiv.1007.0121,
title = {Projective and injective objects in symmetric categorical groups},
author = {Teimuraz Pirashvili},
journal= {arXiv preprint arXiv:1007.0121},
year = {2010}
}