UNIT GROUP OF INTEGRAL GROUP RING Z(G×C3)


Küsmüş Ö.

Miskolc Mathematical Notes, cilt.25, sa.2, ss.829-838, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Sayı: 2
  • Basım Tarihi: 2024
  • Doi Numarası: 10.18514/mmn.2024.4666
  • Dergi Adı: Miskolc Mathematical Notes
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, zbMATH
  • Sayfa Sayıları: ss.829-838
  • Anahtar Kelimeler: direct product, integral group ring, symmetric group, unit group
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

Presenting an explicit descryption of unit group in the integral group ring of a given non-abelian group is a classical and open problem. Let S3 be a symmetric group of order 6 and C3 be a cyclic group of order 3. In this study, we firstly explore the commensurability in unit group of integral group ring Z(S3×C3) by showing the existence of a subgroup as $$ where Fρ denotes a free group of rank ρ. Later, we introduce an explicit structure of the unit group in Z(S3 ×C3) in terms of semi-direct product of torsion-free normal complement of S3 and the group of units in RS3 where R = Z[ω] is the complex integral domain since ω is the primitive 3rd root of unity. At the end, we give a general method that determines the structure of the unit group of Z(G×C3) for an arbitrary group G depends on torsion-free normal complement V(G) of G in U(Z(G×C3)) in an implicit form. As a consequence, a conjecture which is found in [21] is solved.