Izvorni znanstveni članak
About the kernel of the augmentation of finitely generated Z-modules
M. Conrad
Sažetak
Let M be a free finitely generated Z-module with basis B
and ΔM the kernel of the homomorphism M→Z which maps B to 1. A basis of ΔM can be easily constructed from the basis B of M. Let further R be a submodule of M such that N = M/R is free. The subject of investigation is the module ΔN = (ΔM + R) / R. We compute the index [N:ΔN] and construct bases of ΔN with the help of a basis of N. Finally, the results are applied to a special class of modules which is connected with the group of cyclotomic units.
Ključne riječi
augmentation; basis; module; cyclotomic units
Hrčak ID:
864
URI
Datum izdavanja:
20.6.2000.
Posjeta: 1.943 *