A necessary and sufficient condition for a semigroup to have identity element

DOI10.3792/pja/1195521568zbMath0167.28604OpenAlexW1980148342MaRDI QIDQ5554390

Jenö Szép, Sandor Lajos

Publication date: 1967

Published in: Proceedings of the Japan Academy, Series A, Mathematical Sciences (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.3792/pja/1195521568

zbMATH Keywords

generalized groups, semigroups

Related Items (2)

A criterion for the existence of the twosided unity element of semigroups ⋮ Rees matrix semigroups with 4-dimensional sandwich matrices

Cites Work

• Halbgruppen und Ringe mit Linkseinheiten ohne Linkseinselemente
• Maximal subgroups of a semigroup
• Unnamed Item

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