paper

On the Lambek Invariants of Commutative Squares in a Quasi-Abelian Category

arXiv:math/0510072

Abstract

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.

10 pages

On the Lambek Invariants of Commutative Squares in a Quasi-Abelian Category · wovepaper