Some results on congruences on semihypergroups.
Special Elements in H_v - Structures
State hypergroups of automata
Structures algébriques multivoques. Applications
Sul la theorie de la dimension dans les hypergroupes
Sur une classe d'hypergroupes de type C
Ternary quasigroups and the modular group
For a positive integer , the usual definitions of -quasigroups are rather complicated: either by combinatorial conditions that effectively amount to Latin -cubes, or by identities on different -ary operations. In this paper, a more symmetrical approach to the specification of -quasigroups is considered. In particular, ternary quasigroups arise from actions of the modular group.
The hyperrings of order 3.
-extensions of discrete multivalued groups.