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Autor:
Johann B. Leicht
Publikováno v:
Canadian Journal of Mathematics. 15:59-79
The following elementary facts about certain commutative diagrams, called "squares," are stated and proved in terms of abelian groups and their homomorphisms. However, they are valid for arbitrary abelian categories and can be proved also for them. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9869f8197a3b9ea8d57b4f73195596bc
https://doi.org/10.4153/cjm-1963-007-6
https://doi.org/10.4153/cjm-1963-007-6
