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DEMONSTRATIO MATHEMATICAVol. XLIINo 22009Grzegorz Binczak*, Joanna KaletaCYCLIC ENTROPIC QUASIGROUPSA b s t r a c t . In this paper we explain the relationship of some entropic quasigroups toabelian groups with involution. It is known t h a t (Zn, —„) are examples of cyclic entropicquasigroups which are not groups. We describe all cyclic entropic quasigroups with quasiidentity.1. IntroductionIn this paper we describe cyclic quasigroups in the variety EQ1. Thisvariety contains abelian groups. The variety of abelian groups is generated byintegers with the usual addition, whereas EQ 1 is generated by two algebras:integers with the usual addition and integers with the usual subtraction.The first section is devoted to the basic definitions. In the second sectionwe show that the variety EQ 1 is equivalent to the variety of abelian groupswith involution. Thanks to this equivalence, dealing with quasigroups inEQ 1 becomes simpler. The notion of rank of an element can be transferedfrom abelian groups to quasigroups in EQ 1. In the third section we describe finite cyclic quasigroups in EQ 1. One can also consider infinite cyclicquasigroups in EQ 1. We deal with this case in the fourth section.Basic information on quasigroups can be found in [2], [5]. In [3]
Demonstratio Mathematica – de Gruyter
Published: Apr 1, 2009
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