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On half cyclically ordered groups

Ján Jakubík (2002)

Czechoslovak Mathematical Journal

In this paper we introduce and investigate the notion of half cyclically ordered group generalizing the notion of half partially ordered group whose study was begun by Giraudet and Lucas.

On monotone permutations of -cyclically ordered sets

Ján Jakubík (2006)

Czechoslovak Mathematical Journal

For an -cyclically ordered set M with the -cyclic order C let P ( M ) be the set of all monotone permutations on M . We define a ternary relation C ¯ on the set P ( M ) . Further, we define in a natural way a group operation (denoted by · ) on P ( M ) . We prove that if the -cyclic order C is complete and C ¯ , then ( P ( M ) , · , C ¯ ) is a half cyclically ordered group.

On some interpolation rules for lattice ordered groups

Ján Jakubík (2004)

Czechoslovak Mathematical Journal

Let α be an infinite cardinal. In this paper we define an interpolation rule I R ( α ) for lattice ordered groups. We denote by C ( α ) the class of all lattice ordered groups satisfying I R ( α ) , and prove that C ( α ) is a radical class.

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