𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Varieties of Semigroups and Varieties of Completely Regular Semigroups Closed for Certain Extensions

✍ Scribed by F. Pastijn; X.Y. Yan

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
736 KB
Volume
163
Category
Article
ISSN
0021-8693

No coin nor oath required. For personal study only.

πŸ“œ SIMILAR VOLUMES

Minimal Noncryptic e-Varieties of Regula
Minimal Noncryptic e-Varieties of Regular Semigroups
✍ F. Pastijn; M.V. Volkov πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 182 KB

We describe all minimal noncryptic e-varieties of regular semigroups, thus generalising earlier results by Rasin and Reilly that dealt with the completely regular and the inverse cases, respectively. As corollaries, we prove that an e-variety of regular semigroups is cryptic if and only if its inter

Bass–Serre Theory for Groupoids and the
Bass–Serre Theory for Groupoids and the Structure of Full Regular Semigroup Amalgams
✍ Stephen Haataja; Stuart W. Margolis; John Meakin πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 202 KB

U have the same set of idempotents , then the amalgam is strongly embeddable in a regular semigroup S that contains S , S , and U as full regular subsemigroups. In 1 2 this case the inductive structure of the amalgamated free produce S ) S was 1 U 2 studied by Nambooripad and Pastijn in 1989, using