Аннотация:
The non-orthodox 0-simple semigroup A2 of order five admits a unary operation under which it is an involution semigroup. It is known that A2 generates a Specht variety of semigroups. In contrast, it is shown that as an involution semigroup, A2 generates a non-Specht variety. References: 44 entries.
Ключевые слова и фразы:
semigroup, involution, variety, finitely based, Specht variety.
Поступила в редакцию: 11.03.2019 Исправленный вариант: 23.07.2019
Образец цитирования:
Edmond W. H. Lee, “Non-Specht variety generated by an involution semigroup of order five”, Тр. ММО, 81, no. 1, МЦНМО, М., 2020, 105–115; Trans. Moscow Math. Soc., 81:1 (2020), 87–95