Flocks, groups and heaps, joined with semilattices
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2020-11-11 07:45
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512.568.2 (4)
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KNOEBEL, Arthur. Flocks, groups and heaps, joined with semilattices. In: Quasigroups and Related Systems, 2016, vol. 24, nr. 1(35), pp. 43-66. ISSN 1561-2848.
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Quasigroups and Related Systems
Volumul 24, Numărul 1(35) / 2016 / ISSN 1561-2848

Flocks, groups and heaps, joined with semilattices
CZU: 512.568.2

Pag. 43-66

Knoebel Arthur
 
Necunoscută, SUA
 
 
Disponibil în IBN: 3 august 2016


Rezumat

This article describes the lattice of varieties generated by those of flocks and near heaps. Flocks and heaps are two ways of presenting groups by a ternary operation rather than a binary one. Their varieties joined with that of ternary semilattices create the varieties of near flocks and near heaps. This is done by finding normal forms for words that make up free algebras. Simple sets of identities define these varieties. Identities in general are decidable. Each near flock is a Plonka sum of flocks, and each near heap is a Plonka sum of heaps. An algorithm translates any binary group identity to one in a ternary operation satisfied by near heaps.