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math.CO2023
Constructing linked systems of relative difference sets via Schur rings
Mikhail Muzychuk, Grigory Ryabov
In the present paper, we study relative difference sets (RDSs) and linked systems of them. It is shown that a closed linked system of RDSs is always graded by a group. Based on thi…
math.GR2023
On schurity of dihedral groups
Grigory Ryabov
A finite group is called a Schur group if every -ring over is schurian, i.e. associated in a natural way with a subgroup of that contains all right translations…