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| Página principal > Artículos > Artículos publicados > Characterization of the inessential endomorphisms in the category of Abelian groups |
| Fecha: | 2003 |
| Resumen: | An endomorphism f of an Abelian group A is said to be inessential (in the category of Abelian groups) if it can be extended to an endomorphism of any Abelian group which contains A as a subgroup. In this paper we show that f is as above if and only if (f − v idA)(A) is contained in the maximal divisible subgroup of A for some v ∈ Z. |
| Derechos: | Tots els drets reservats.  |
| Lengua: | Anglès |
| Documento: | Article ; recerca ; Versió publicada |
| Materia: | Category ; Inessential ; Monomorphism ; Rigid ; Divisible ; Extension |
| Publicado en: | Publicacions matemàtiques, V. 47 N. 2 (2003) , p. 359-372, ISSN 2014-4350 |
