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Open Access Research Article

The pre-periods of all endomorphisms of a finite cyclic group

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pp. 2351–2357Vol. 28Issue 6September 2025DOI: 10.47974/JDMSC-2293 Crossmark XML
Received:
05 Nov 2024
Published Online:
14 Aug 2025
Article type:
Research Article
Language:
EN
Article no.:
JDMSC-2293
Pages:
2351–2357

Abstract

Let G be a group. By Fitting’s lemma, if G is finite abelian and t is the pre-period of G, then G can be represented as the direct sum of kerf t and f t (G) for all endomorphisms f of G. In this paper, we will show that the pre-period of a cyclic group of order n is the maximum of νp (n) (the p-adic valuation of n) for all prime p with p|n. Indeed, the pre-periods of all endomorphisms of a finite cyclic group are determined in terms of the p-adic valuations.

Keywords

Subject Classifications

08A6008A3520E34

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