On the Lambek Invariants of Commutative Squares in a Quasi-Abelian Category
Yaroslav Kopylov
所有作者
Yaroslav Kopylov
文献摘要
We consider the invariants Ker and Im for commutative squares in
quasi-abelian categories. These invariants were introduced by Lambek for groups
and then studied by Hilton and Nomura in exact categories.