On the group properties of substitutions defined on the subgroup cosets of finite Abelian group of composite order
Matematičeskie voprosy kriptografii, Tome 7 (2016) no. 1, pp. 83-92
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Necessary and sufficient conditions of transitivity and primitivity of substitution groups generated by substitutions on the cosets of the Abelian group $G$ are obtained. The structure of these groups is described for the case of their primitivity and for the case when $G$ is the direct product of its subgroups. Necessary and sufficient conditions of primitivity of the group generated by the right regular representation of the group $G$ and a substitution defined on the cosets of the group $G$ are obtained also.
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