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

Yaroslav  Kopylov

doi:10.71712/

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Published: 2025-08-08

DOI: https://doi.org/10.71712/

Keywords:

Quasi-abelian category, commutative square, Lambek invariants

Yaroslav Kopylov

Sobolev Institute of Mathematics, Akademik Koptyug Prospect 4, 630090, Novosibirsk, Russia

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 categories exact in the sense of Buchsbaum.

Issue

Vol. 11 (2005)

Section

Articles

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

How to Cite

Kopylov, Y. . (2025). On the Lambek Invariants of Commutative Squares in a Quasi-Abelian Category. Scientia Series A: Mathematical Sciences, 11, 57-67. https://doi.org/10.71712/