We prove that every additive category has a unique maximal exact structure in the sense of Quillen.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-fm214-1-5, author = {Wolfgang Rump}, title = {On the maximal exact structure of an additive category}, journal = {Fundamenta Mathematicae}, volume = {215}, year = {2011}, pages = {77-87}, zbl = {1252.18023}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm214-1-5} }
Wolfgang Rump. On the maximal exact structure of an additive category. Fundamenta Mathematicae, Tome 215 (2011) pp. 77-87. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm214-1-5/