A note on simple trinomial units in U1(ZCp)

A note on simple trinomial units in U1(ZCp)

In this paper, some new notions are defined about the unit group U1(ZG) of a finite group G. Especially, notion of simple unit is defined by using the number of elements in its support and absolutely small coefficients of the unit. Units are classified as monomial, binomial, trinomial and k-nomial, level, unit with level l and simple unit. We have shown triviality of monomial units and nonexistence of binomial units in the unit group U1(ZG) of an arbitrary finite group G. Some basic results and examples are posed about simple units and simple trinomial units in U1(ZCp)of a cyclic group Cp , where p ⩾ 5.

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  • [1] Aleev ZH, Panina GA. The units of cyclic groups of order 7 and 9. Russian Mathematic 2000; 11: 80-83.
  • [2] Ayoub RG, Ayoub C. On the unit group of a finite abelian group. Bulletin of the Australian Mathematical Society 1969; 1: 245-261.
  • [3] Bass H. The Dirichlet unit teorem, induced characters and Whitehead groups of finite groups. Topology 1966; 4: 391-410.
  • [4] Bilgin T. Characterization of U1(ZC12). International Mathematical Journal 2004; 14 (4): 525-529.
  • [5] Higman G. The units of group-rings. Proceedings of the London Mathematical Society 1940; 46 (2): 231-248.
  • [6] Karpilovsky G. Unit Group of group Ring. London, UK: Longman Scientific Technical, 1989.
  • [7] Karpilovsky G. Unit Group of Classical Rings. Oxford, UK: Clarendon Press, 1988.
  • [8] Low RM. On the units of integral group ring Z[G ×Cp]. Journal Algebra and Its Application 2008; 7: 393-403. doi: 10.1142/S0219498808002898.
  • [9] Milnor J.Whitehead torsion. Bulletin of the American Mathematical Society 1966; (72): 358-426.