Bi-hypertas, demi-groupes, demi-hypergroupes. (Bi-hyperheap, semigroups, semihypergroups). (French) Zbl 0228.20071
MSC:
20M99 | Semigroups |
20M12 | Ideal theory for semigroups |
20N20 | Hypergroups |
20N10 | Ternary systems (heaps, semiheaps, heapoids, etc.) |