Relaxed multi category structure of a global category of rings and modules
arXiv:math/9912075
Abstract
In this paper we describe how to give a particular global category of rings and modules the structure of a relaxed multi category, and we describe an algebra in this relaxed multi category such that vertex algebras appear as such algebras.
19 pages, xy-pic, epsfig. Updated version to appear in the Journal of Pure and Applied Algebra including various corrections and additional citations